Kathari Remnant [Mystery Booster] Rat Ninja and a green creature: Search

and a green creature: Search your library for a card named Hellkite Overlord

Earthen Goo gets +1/+1 for each age counter on it

If a land is tapped for mana

An opponent chooses one of them

Goblin Mutant can't attack if defending player controls an untapped creature with power 3 or greater

Kathari Remnant [Mystery Booster] Rat Ninja and a green creature: SearchSet: Mystery Booster Type: Creature Bird Skeleton Rarity: Uncommon Cost: {2}{U}{B} Flying {B}: Regenerate Kathari Remnant. Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)