Dosan the Falling Leaf [Champions of Kamigawa] Fifth Edition Leviathan can't attack unless you

Leviathan can't attack unless you sacrifice two Islands

you may look at the top three cards of your library

Set: Invasion Type: Artifact Rarity: Rare Cost: {3} Sacrifice a creature: Add one mana of any color

target player may put Khorvath into their hand from their library

Dosan the Falling Leaf [Champions of Kamigawa] Fifth Edition Leviathan can't attack unless youSet: Champions of Kamigawa Type: Legendary Creature Human Monk Rarity: Rare Cost: {1}{G}{G} Players can cast spells only during their own turns. "Each night as Master Dosan prays to the kami, the hate he receives in return withers his body a little more. Though the kami are slowly killing him, still he continues his prayers." Meditation journal of a young budoka