Manacharged Elemental

At the beginning of your first main phase, if you control five or more forests, Manacharge. (Add {g} to your mana pool for each of your opponents)
{4}{g}{g}, put a -1/-1 counter on Manacharged Elemental: Create an 8/8 green Manaborn Beast creature token. Use only mana added to your
mana pool with Manacharge to activate this ability.