Sigil of Valor - Magic Origins - 239

Artifact — Equipment

Mana Cost: {2}

Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Uncommon · Magic Origins · #239 (ORI)

Illustrated by Dan Murayama Scott