Korvax, Abyssal Reef

Korvax is not a spell
Korvax is blue
Shroud Defender
As korvax enters the battlefield, mill 5 cards
Korvax's power and toughness are each equal to
the number of lands in your discard pile
Whenever a player were to mill one or more cards,
they mill twice as much instead
{t}: add {u}
{x}{u}{u}{t}: each player mills X cards
Partner