Eldritch Marsh Sovereign

Eldritch Marsh Sovereign's power and toughness
are each equal to the number of basic land types
among lands you control.
Whenever a land enters the battlefield under your
control, you may draw a card. If you do, discard a
card.
In the heart of the eldritch marsh, a sovereign
entity stirs, its form ever-changing, its presence
suffused with the essence of the land itself.