Territorial Kavu (Modern Horizons 2)

Creature Ñ Kavu - Domain Ñ Territorial Kavu's power and toughness are each equal to the number of basic land types among lands you control.
Whenever this creature attacks, choose one Ñ
¥ Discard a card. If you do, draw a card.
¥ Exile up to one target card from a graveyard.