Brock's Gym

Challenge {1} (Opponents {3})
Create a 1/2 Brock's Geodude token. Target
creature you control fights Brock's Geodude. If
your creature defeats the token and survives, you
may put an indestructible Boulder Badge artifact
onto the battlefield under you control with "all
ground and rock creatures you control get
+0/+1." The Geodude token is exiled if you lose
the fight. No player can have more than one
Boulder Badge under their control.