Sapling of Colfenor [Eventide] Island Mountain Creatures can't attack you unless

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

the Awoken World

return the first card to the battlefield under its owner's control at the beginning of the next end step

shuffle it into its owner's library

When you've got nothing

Sapling of Colfenor [Eventide] Island Mountain Creatures can't attack you unlessSet: Eventide Type: Legendary Creature Treefolk Shaman Rarity: Rare Cost: {3}{B G}{B G} Indestructible Whenever Sapling of Colfenor attacks, reveal the top card of your library. If it's a creature card, you gain life equal to that card's toughness, lose life equal to its power, then put it into your hand. Her plans may yet bear fruit.