Sprouting Roots

Put a roots counter on each creature. Creatures with a roots counter become Walls in addition to their creature types, have a base power and toughness 0/2, lose all abilities and gain Defender.
"Vitaeus, we believe that that the Wellspring is here to help people, never kill. We have come up with a plan
to see that its power remains true to its main purpose."
- The Wellspring Auspex