Allosaurus Rider 
Creature — Elf Warrior
You may exile two green cards from your hand rather than pay this spell's mana cost. Allosaurus Rider's power and toughness are each equal to 1 plus the number of lands you control.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL