Alden, the Fell God

Indestructible, Vigilance
Each player can't cast more than one spell each
turn.
At the beginning of your end step, if you don't
control a creature named Druthnir, create
Druthnir, a legendary 3/3 Horse Demigod
creature token with "creatures you control can't
be blocked except by artifact creatures and/or
black creatures."