It also has a passive ability that makes it incredibly safe to use: As long as The Aetherspark is attached to a creature, The Aetherspark cant be attacked and has Whenever equipped creature deals combat damage during your turn, put that many loyalty counters on The Aetherspark. With the right creature, you could be drawing two extra cards a turn, or you could simply make it easier to ramp up its ultimate ability
The Magic: The Gathering Tarkir Dragonstorm Play Booster Box includes 30 Play Boosters, each containing 14 cards plus a Token or Art card
Meneldor, Swift Savior is a repeatable blink on a relevant creature type with baked in evasion
What you search for with Birthing Pod should depend partly on how likely your opponent is to kill the creature you find
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Lets not forget all the little baby Eldrazi, in the form of Spawn and Scion tokens