Empress Galina [The List] Open the Helvault Set: Betrayers of Kamigawa Type:

Set: Betrayers of Kamigawa Type: Instant — Arcane Rarity: Rare Cost: {X}{B}{B} You may exile a black card with mana value X from your hand rather than pay this spell's mana cost

it gets +2/+2 until end of turn for each creature blocking it beyond the first

but you may put it on top of your library instead of into your graveyard

that player discards a card and you untap all lands you control

Empress Galina [The List] Open the Helvault Set: Betrayers of Kamigawa Type:Set: The List Type: Legendary Creature Merfolk Noble Rarity: Rare Cost: {3}{U}{U} {U}{U}, {T}: Gain control of target legendary permanent. (This effect lasts indefinitely.) Above the waves you may be mighty indeed, but down here you belong to me.