Perishing Treehouse

• At the beginning of your upkeep, put an
Overgrown counter on Perishing Treehouse.
•As long as Perishing Treehouse is on the
battlefield, Swamps and Forests you control have
"{t} add {b} or {g}".
• At the beginning of your end step, if there are
five or more overgrown counters on Perishing
Treehouse, sacrifice it, search your library for a
Swamp and a Forest cards and put those cards
on the battlefield, then, shuffle your library.