Jacob and Gideon

Soulbond
As long as Jacob and Gideon is paired with
another creature, both creatures have first
strike and hexproof.
Doubleteam (Whenever this creature attacks
you may create a token that is a non-legendary
copy of it that is tapped and attacking. At the
beginning of your next end step, exile that token.)
If Jacob and Gideon would leave the battlefield
for any reason, you may instead choose to shuffle
it into your deck.