Gwenna, Eyes of Gaea

盖亚之眼关娜 (Gwenna, Eyes of Gaea) (zhs)

Legendary Creature - Elf Druid Scout | Power/Toughness: 2 / 3 (CMC 3)
: Add two mana in any combination of colors. Spend this mana only to cast creature spells or activate abilities of a creature or creature card.
Whenever you cast a creature spell with power 5 or greater, put a +1/+1 counter on Gwenna, Eyes of Gaea and untap it.