Issac's Forest

When Issac's Forest enters the battlefield you may reveal a bear card from your hand if you don't return land you control to it's owner hand
{t}: add {g}
{g}{t}: reveal any number of bear cards from your hand then add {g} for each card revealed this way
{g}{g}{g}{t}: Create a 10/10 green legendary bear creature token named Issac's Companion with trample use this ability only if you want vengeance on a player