Yuriko, the Tiger's Shadow #C2
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Card Details
Commander ninjutsu 
Whenever a Ninja you control deals combat damage to a player, reveal the top card of your library and put that card into your hand. Each opponent loses life equal to that card's mana value.
1/3
Illustrated by Yongjae Choi
Rulings (4)
Nov 10, 2020
Activating Yuriko's commander ninjutsu ability isn't the same as casting Yuriko as a spell. You won't have to pay the commander tax to activate that ability, and activating that ability won't increase the commander tax to pay later.
Nov 10, 2020
Although the ninjutsu ability has the creature enter the battlefield attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example).
Nov 10, 2020
Commander ninjutsu is a variant of ninjutsu that can be activated from the command zone as well as from your hand. Just as with regular ninjutsu, the Ninja enters attacking the player or planeswalker that the returned creature was attacking.
Nov 10, 2020
If a card in a player's library has 
in its mana cost, X is considered to be 0.
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