Yddrun the Unyielding

Partners with Bakku, Summit Lord (When this creature enters the battlefield, target player may put
Bakku, Summit Lord into their hand from their
library, then shuffle.)
Vigilance
Goat creatures you control have "{t}: Add one
mana of any color" and "{t}: Target creature
blocks a Goat creature this turn if able."
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Partner:
https://mtgcardsmith.com/view/bakku-summit-lord-1