So in that space and in a blink deck, Staff of Eden, Vault's Key seems fun
However, Rattlechains makes your other Spirits a fair bit better, both protecting one, and giving future Spirits flash (which works great with Topplegeist and Spectral Shepherd)
In this situation, some folks adopted the draft one card, get more multiples of it later in deckbuilding rule, as cards like Squadron Hawk can be interesting to build around but are useless in singleton
We're tickled every time a new achievement story crosses our social feed
Im very impressed by Necron Deathmark s ability to enter at flash speed to destroy a creature, mill the player of your choice, and stick around as a 5/3 body for just 5 mana