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And if all else fails, Creeperhulk itself is a 5/5 trampler, so its serviceable in combat

You need a way to easily identify what you need so you can pull content, whether its scenarios or modular sets

If most of your creatures are 1-drops and 2-drops, as is the case in many decks like Delver, wheres the restriction

On the other hand, the backsidea new Epharais one of the strongest Enchantresses we've ever seen, as a 4/4 lifelink indestructible creature (assuming you have three enchantments, which you should in a deck that would want Invasion of Theros) that draws a card each time you play an enchantment

this will return Myr Retriever to the battlefield, untapping Blasting Station