Raging Battle Mouse

The second spell you cast each turn costs {1} less to cast.
Celebration — At the beginning of combat on your turn, if two or more nonland permanents entered the battlefield under your control this turn, target creature you control gets +1/+1 until end of turn.

Card Details:
Set: Wilds of Eldraine Promos
Collector Number: 143s
Artist: Rudy Siswanto