Sakashima's Student [Planechase Anthology] Zendikar Prerelease Promos Whenever a Mountain enters the

Whenever a Mountain enters the battlefield under your control

If the player doesn't discard a card this way

Everybody knows that to ward off trouble

you may put an arrow card from your hand face up into your arsenal

When you cast this spell

Sakashima's Student [Planechase Anthology] Zendikar Prerelease Promos Whenever a Mountain enters theSet: Planechase Anthology Type: Creature Human Ninja Rarity: Rare Cost: {2}{U}{U} Ninjutsu {1}{U} ({1}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) You may have Sakashima's Student enter the battlefield as a copy of any creature on the battlefield, except it's a Ninja in addition to its other creature types.