Great Oak Guardian 
Creature — Treefolk
Flash (You may cast this spell any time you could cast an instant.) Reach When this creature enters, creatures target player controls get +2/+2 until end of turn. Untap them.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL