Castle of Aaargh - Dark Depths (SLD-1680) - Secret Lair Drop / Castle of Aaargh (Borderless)

Dark Depths enters with ten ice counters on it.
{3}: Remove an ice counter from Dark Depths.
When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.