Unchecked Growth 
Instant — Arcane
Target creature gets +4/+4 until end of turn. If it's a Spirit, it gains trample until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant — Arcane
Target creature gets +4/+4 until end of turn. If it's a Spirit, it gains trample until end of turn.