Etherium-Horn Sorcerer [Commander 2016] OP01-029 Set: Modern Horizons 2 Type:

Set: Modern Horizons 2 Type: Creature — Human Druid Rarity: Uncommon Cost: {1}{G}{G} When Yavimaya Elder dies

You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs

where X is 2 plus the number of cards banished to play this

another target Knight you control gets +2/+2 and gains trample and haste until end of turn

Etherium-Horn Sorcerer [Commander 2016] OP01-029 Set: Modern Horizons 2 Type:Set: Commander 2016 Type: Artifact Creature Minotaur Wizard Rarity: Rare Cost: {4}{U}{R} {1}{U}{R}: Return Etherium Horn Sorcerer to its owner's hand. 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.)