Ceres Fauna, Nature Grace

When Ceres Fauna, Nature Grace enter the battlefield chose one —
- Exile any creature card with total mana value
X or less from the battlefield and/or graveyard,
put sapling counter on that card.
- Return up to X creature exiled with sapling
counter to the battlefield under your control.
If X is ten or more chose both mode.
All other creature you control become Saproling
with base power and toughness X/1.