Awakened Ancient Guardian

Vigilance: This creature doesn’t tap when attacking.

Evolve: Whenever a creature with lesser power or toughness enters the battlefield under your control, put a +1/+1 counter on Awakened Ancient Guardian.

Shell's Wrath: When Awakened Ancient Guardian enters the battlefield, you may deal damage equal to its power to any target.

Playability: Awakened Ancient Guardian can only be played through Cocoon of the Ancients.