So a 1/1 Trampler for GG is pretty weak but it can get bigger but it is only really strong in monogreen. Are there any cunning ways of putting Forests into play at Instant speed? (in response to the activation)
Harrow and Veteran Explorer were all I could find, and the Explorer needs to be knocked off to do anything. I think the wording of the ability could be simplified, though:
X: Remove all +1/+1 counters from ~this~. Put X +1/+1 counters on ~this~, where X is equal to the number of Forests you control.