It's not exactly an extra turn spell, but it certainly feels like a Time Warp and an Opportunity stapled to a card that any deck can play
Implement of Malice : Artifact, casting cost of two generic mana
This means choosing one of your opponents characters to lose four strength while one of your own gains four
if you need him, Gideons not opposed to activating and climbing into Skysovereign, Consul Flagship
Note that unlike many other cheap tutors on bodies this puts it into your hand not on top of the library, and has no restrictions other than the subclass of card named Equipment
This is quite a powerful creature given its cost, and while it may only be a 1/3 itself, its impact on the game is centered more around its other abilities