Jon Snow, Oathkeeper

Undying, vigilance

Whenever Jon Snow or another creature you control dies,
if it wasn’t named Ghost, you may create Ghost, a legendary 2/2 white and black Wolf creature token with deathtouch.

{b}{b}, {t} Sacrifice a creature: Target player loses life
and you gain life equal to the sacrificed creature's power.

Partner with Daenerys, Breaker of Chains.