Sky "Sky-la-fluff"

Alert Bark — When a creature enters the battlefield under an opponent’s control, Sky barks: Deal 1 damage to that creature unless they pay {1}.

Squirrel Pursuit — Whenever Sky attacks and isn’t blocked, you may exile target token creature. If you do, Sky gets +1/+0 until end of turn.

Overexcited Leap — Sky enters tapped if an opponent controls a Human.