Markmaker

Overwhelm - A unit or spell with Overwhelm will deal any excess damage to your opponent on your turn (does not work while blocking).

Summon - Does something when played

Corrupted - When a unit with Corrupted dies, a 0 strength Nightmare Shade is played. Shades have the ability to sacrifice themselves by paying their corrupted cost to play the starting unit's Summon ability. Shades lose 1 health at the end of each of your turns.