mtg commander decks edhrec Starter Krile Baldesion is the EDHREC

Granted this isn't all that warps a deck to an advantage, but Game Changers are ones that in almost any deck can warp the game to their advantage.

If there are no other creatures in play, do I have to return Double Header to my hand

This is a Relentless Assault on legs

This is just one more than many single things like target recursion spells such as Karmic Guide, but they choose so they'll always choose the worst for you, unless you play politics

It isn't so much about this being better than Mizzium Mortars or Oblitering Bolt but more about how much better your deck looks when you can replace a two drop with a one drop and lose almost nothing in doing so

This means a Shifted card is more economical to place on the field, and a Shifted character can also challenge on the same turn it is played provided the Ink is dry on the bottom card