Brenton, Plains Treader

Brenton, Plains Treader's power and toughness
are each equal to the number of Plains you
control.
Whenever Brenton deals combat damage to a
player, search your library for a plains card.
Reveal it and put it into your hand, then Shuffle.
Plainsfall — Whenever a Plains enters the battlefield under your control, knights you
control get +1/+1 until end of turn.