0 mana cards mtg All Zero in Magic Deck 0 mana counterspell... kinda... :

Kellan has had adventure abilities in The Lost Caverns of Ixalan and Murders at Karlov Manor , though its hard to say if that means the mechanic is branching out or if this is a way to tie him to his home plane

Geier Reach Bandit / Vildin-Pack Alpha Geier Reach Bandit / Vildin-Pack Alpha seems good at first glance, but unfortunately that ability on Vildin-Pack Alpha doesnt work at all with the daybound/nightbound werewolves

Bounce or blink support adds even more juice

Even so, Tifas Melee ability will trigger every combat, too, allowing her to gain +3/+3 during each combat phase if youre declaring attacks against all three opponents