Austere Command (Invocation) [Amonkhet Invocations] Nissa Set: Mirrodin Besieged Type: Sorcery

Set: Mirrodin Besieged Type: Sorcery Rarity: Rare Cost: {X}{G} Search your library for a green creature card with mana value X or less

When Thought-Knot Seer enters the battlefield

Leviathan can't attack unless you sacrifice two Islands

Set: Commander Anthology Volume II Type: Enchantment Rarity: Rare Cost: {1}{B}{B}{B} Whenever a creature you control dies

if Rasputin started the turn untapped

Austere Command (Invocation) [Amonkhet Invocations] Nissa Set: Mirrodin Besieged Type: SorcerySet: Amonkhet Invocations Type: Sorcery Rarity: Mythic Cost: {4}{W}{W} Choose two Destroy all artifacts. Destroy all enchantments. Destroy all creatures with mana value 3 or less. Destroy all creatures with mana value 4 or greater.