“Self-discard” is not a formal Magic term, so the first step is to identify what job the deck needs. A discard outlet is a card that lets you discard a card from your hand. It is different from a spell that makes an opponent discard, a mill effect that puts cards from a library into a graveyard, or a card that discards itself for cycling. It is also important to distinguish an activated ability whose discard is a cost from a spell or ability that tells you to discard while it resolves. Both can enable Madness, but they play differently.
Magic’s official Madness notes are clear: Madness works regardless of why the card is discarded, including to pay a cost or because an effect tells a player to discard. The player still needs an actual instruction or cost; Madness does not permit discarding a card at will. When a Madness card is discarded, it is exiled instead of going directly to the graveyard, then its triggered ability offers the chance to cast it for its Madness cost. That is why repeatable discard outlets are valuable, and why their timing and restrictions matter.
Best no-mana repeatable outlet: Putrid Imp
Putrid Imp costs one black mana to cast and has an activated ability that lets its controller discard a card to give it flying until end of turn. The discard is on the left side of the colon, so it is a cost of activating the ability. Once Putrid Imp is on the battlefield, no mana is required for each discard. That makes it a useful outlet for a graveyard deck that needs to place a specific card in the graveyard or for a Madness deck that wants to discard during a chosen window.
Best combat outlet: Wild Mongrel
Wild Mongrel is a two-mana green creature with “Discard a card” as the cost of an ability that gives it +1/+1 and makes it the color of its controller’s choice until end of turn. Like Putrid Imp, it can be activated repeatedly as long as cards remain in hand. The card has a concrete battlefield payoff for discarding: it can grow in combat and change color for the turn.
That payoff should not hide the cost. Each activation spends a card, and the boost ends at the end of turn. Wild Mongrel is strongest where the discarded card has its own value through Madness, flashback, reanimation, threshold-style graveyard plans, or a similarly deliberate payoff. It is not a free pump spell, and it is not a draw engine. Players should also check current format legality before choosing it for a constructed deck.
Best mana-producing outlet: Skirge Familiar
Skirge Familiar has “Discard a card: Add {B}.” Here again, the discard is an activation cost, while the ability produces black mana. This is a different kind of outlet from a creature that only gets larger. It can turn selected cards in hand into mana, which can matter when a deck wants both a discard trigger and resources to cast a spell afterward.
Best creature-card exchange: Tortured Existence
Tortured Existence is a black enchantment with an activated ability that costs one black mana and requires discarding a creature card. Its effect returns a target creature card from the controller’s graveyard to hand. This is a restricted outlet: it cannot discard an instant, land, artifact, or noncreature Madness card. In return, it links the discard to a specific creature-card recovery plan.
Use it in a creature-heavy graveyard deck that wants to trade one creature in hand for another creature already in the graveyard. It is particularly poor when the hand contains the wrong card types or the graveyard has no worthwhile creature target. The card demonstrates why “repeatable” is not enough: the exact words after the colon decide what an outlet can accomplish.
Best creature tutor outlet: Fauna Shaman
Fauna Shaman lets its controller pay green mana, tap it, and discard a creature card to search the library for a creature card and put that card into hand. The discard and tap are costs, so they happen before the search ability resolves. It is a focused choice for creature-toolbox decks, where the discard is acceptable because the ability finds a better creature for the present situation.
Best Commander Madness engine: Anje Falkenrath
Anje Falkenrath has haste and an activated ability: tap it, discard a card, then draw a card. Its discard is a cost, and the draw happens when the ability resolves. Whenever a discarded card has Madness, Anje also untaps. That means a deck built with enough Madness cards can convert the untap trigger into multiple activations, one card at a time, provided the player can continue paying the other costs and has cards to discard.
The sequencing matters. Official release notes explain that when a Madness card is discarded to pay an activated ability’s cost, the Madness trigger and the spell cast through it resolve before the ability the discard paid for. Do not summarize Anje as simply “discard and immediately draw.” The card is a strong dedicated Commander option because the text rewards a large Madness package; it is much less compelling when the deck has only a few such cards.
Best one-shot draw-then-discard spells
Careful Study says to draw two cards, then discard two cards. Faithless Looting likewise draws two, then discards two, and has flashback. Frantic Search draws two, discards two, then untaps up to three lands. In all three cases, the discard is an effect during resolution, not a cost paid to begin casting the spell. The player gets to see the drawn cards before choosing what to discard, which is why these are card-selection tools rather than standing outlets.
Frantic Search’s land-untap clause can make its mana use easier to manage in the right board state, but it is still a one-shot spell, not a repeatable ability. Faithless Looting’s flashback gives it a second use from the graveyard, but that does not make the first discard a casting cost. Careful Study is the simplest of the three: choose it when the deck wants the draw-two-then-discard-two action and can use blue mana.
Best repeatable draw-then-discard creature: Merfolk Looter
Merfolk Looter taps to draw a card, then discard a card. The discard happens as the activated ability resolves, after the draw, so it is not a cost. This is a repeatable selection engine: it improves a hand over several turns while placing chosen cards into the graveyard. It differs sharply from Putrid Imp or Wild Mongrel because it cannot discard a card at any chosen moment without first resolving its own draw effect.
That timing makes Merfolk Looter better for slow filtering than for surprise Madness plays. It also needs to tap and survive a turn after casting before it can normally activate. A deck that needs discard at instant speed on another player’s turn should prefer an outlet whose activation can be used then, assuming its other costs can be paid.
Do not confuse the categories
- Discard as a cost: Putrid Imp, Wild Mongrel, Skirge Familiar, Tortured Existence, Fauna Shaman, and Anje Falkenrath require the discard before their abilities go on the stack.
- Discard as an effect: Careful Study, Faithless Looting, Frantic Search, and Merfolk Looter have the player discard while the spell or ability resolves.
- Additional-cost spells are separate again: a card such as Cathartic Reunion requires discarding as an additional cost to cast it; if the spell is countered, the cards were still discarded.
- Madness works with either route: choose the card for timing, color, card type restrictions, and the payoff it provides beyond putting a card into the graveyard.
The best self-discard card is therefore the one whose exact text matches the deck’s goal. Pick a no-mana repeatable outlet for immediate graveyard access, a creature-restricted exchange when creature recursion matters, Anje for a Madness-heavy Commander deck, or draw-then-discard spells when card filtering is the real job. Reading whether “discard” appears before or after the colon prevents most costly deckbuilding mistakes.