Ambling Stormshell (PTDM 37p)

Creature — Turtle • Mana cost: {3}{U}{U} • Tarkir: Dragonstorm Promos • Rare

Ward {2}
Whenever this creature attacks, put three stun counters on it and draw three cards. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Whenever you cast a Turtle spell, untap this creature.

Illustrated by Carlos Palma Cruchaga.