Callisto, Field-Gazer

Spells in players' hands have Assist.(Another player may pay up to X of that spell's cost, where X is the total generic mana cost. X cannot be 0.)

Offer a Paw — Whenever a player Assists a spell,
you and that player create a tapped treasure token.

Rest a While — Whenever you Assist a spell, the Assisted player cannot attack you until the beginning of your next turn, then draw a card.