Yahenni wants a deck that sacrifices its own creatures to drain opponents' life. It also suits a deck that gives up its own cards on purpose to get something back.
Mana cost
Black ()
Power / toughness2 / 2
RarityRare
Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni.
Sacrifice another creature: Yahenni gains indestructible until end of turn.
Picked for what they do in Yahenni's deck. When two cards do the same job, the one with the lower comes first. All of them fit Yahenni's color identity.Mana ValueThe total amount of mana a card costs, all added up. A card costing two generic and one green has a mana value of three. Wizards renamed this from "converted mana cost" in 2021, so older cards and articles may still use the old name.Open the full glossary
explain how Yahenni works in tricky situations. They come from Wizards of the Coast, the company that makes Magic.RulingThe official answer to how a card works in a tricky situation. Most rulings are written by Wizards of the Coast, the company that makes Magic, and a few are notes from Scryfall, the card database Magic players use. A ruling explains a card. It does not change what the card says.Open the full glossary
Wizards of the Coast9 Feb 2017
If Yahenni and a creature an opponent controls die simultaneously (perhaps because they fought or were in combat together), Yahenni won't be on the battlefield as its triggered ability resolves. It can't be saved by the +1/+1 counter that would have been put on it.
Color identityEvery color of mana symbol on a card, in its cost and in its rules text. Your commander's color identity sets the limit for your whole deck: every other card has to fit inside it. A deck led by a green and white commander cannot play a card with any blue in its color identity.Open the full glossaryBPlayers write colors as letters: B for black.AristocratsAristocrats decks sacrifice their own creatures on purpose and profit every time one dies, often by draining life from each opponent. A sacrifice outlet, a card that lets you sacrifice whenever you like, decides when that happens.Open the Aristocrats pageSacrifice OutletA permanent that lets you sacrifice your own creatures or artifacts whenever you want, usually for free. Every Aristocrats deck needs one, because cards that reward a creature dying only help if you choose when it dies. Ashnod's Altar, Viscera SeerOpen the Sacrifice Outlet pageDeath TriggerTriggers when a creature dies, whether it is this creature, one of yours or an opponent's. These are the cards that pay you in an Aristocrats deck: something else makes creatures die, and these decide what you get each time. Blood Artist, Solemn SimulacrumOpen the Death Trigger pageProtectionA creature with protection from something, like a color, is safe from anything with that quality. It cannot be damaged, enchanted or equipped, blocked, or targeted by it, and players remember the four with the word DEBT. It does not stop effects that neither target nor damage, like a board wipe that destroys every creature. ProgenitusOpen the Protection pageSacrificeSacrifice decks give up their own creatures, Treasures and other cards on purpose and get something back each time. A sacrifice outlet, a card that lets you sacrifice whenever you want, is the heart of the deck.Open the Sacrifice pageCounter EngineAdds +1/+1 counters over and over rather than once. A counter here is a small permanent marker that raises a creature's power and toughness for good. It is not a counterspell, which is a different thing entirely. Something that adds them every turn makes your whole board bigger and keeps it that way. Hardened Scales, Corpsejack MenaceOpen the Counter Engine page+1/+1 CountersPuts +1/+1 counters on creatures, permanently raising their power and toughness. Unlike a temporary boost that wears off at end of turn, these markers stay put and stack up over a long game. Hardened Scales, The Great HengeOpen the +1/+1 Counters page+1/+1 Counters+1/+1 counter decks put small markers on their creatures that make each one permanently bigger, and keep adding more every turn. Each +1/+1 counter adds one to a creature's power (the damage it deals) and toughness (the damage it can take).Open the +1/+1 Counters page
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