Slinza, the Spiked Stampede{4}{G}

Legendary Creature — Beast

Beast spells you cast cost {2} less to cast. Each other Beast creature you control enters with an additional +1/+1 counter on it. Whenever Slinza or another creature with power 4 or greater enters, you may pay {1}{R/G}. When you do, Slinza fights target creature you don't control.