Corbel, Forest Alchemist

Reach, Trample, Forestwalk
When Corbel deals combat damage to a player,
put an Overgrowth counter on that player.
Nonbasic Lands controlled by players with Overgrowth counters are basic Forests. Creatures controlled by players with Overgrowth counters
lose all abilities and types and are 3/3 Apes.
When Corbel leaves, he deals damage to each
player equal to the number of counters on them,
then remove all Overgrowth counters from all
players.