Card Name Mana Cost Type Enchantment Rarity Common rules Text When this enchantment enters, exile another target nonland permanent.When this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control
As mentioned, you might not be able to activate it every turn if you need to cast spells on curve, but either way you should be able to transform it over time
The archetypes which want those kinds of cards are red-white, green-white, black-red, and (to some degree) green red
If youre primarily a player, focus on cards that improve your decks rather than on those everyone else is chasing
Drawing and playing one card each turn slows the game to a crawl and all those fun interactions you were having at the start of the game dry up
Theros (2013), being a world based on Greek mythology (or inspired by), has plenty of hydras to go around