Building — Tree • Cost: 3 • HP: 4
Your units and heroes with +1/+1 runes have overpower.
⤵ → Put three +1/+1 runes on a unit or one on a hero if that unit or hero doesn't have any +1/+1 runes.
Green • Growth Tech II
You can target a unit or a hero which already have +1/+1 rune(s). It just won't add more runes. — sharpo, 12/02/16
Keyword Rulings: Overpower