9/25/2006: The third ability normally lets Foriysian Totem block two creatures. If another effect also lets it block an additional creature, the effects are cumulative.
9/25/2006: If an effect says Foriysian Totem can't block, then it can't block any creatures.
8/1/2008: A noncreature permanent that turns into a creature is subject to the "summoning sickness" rule: It can only attack, and its {T} abilities can only be activated, if its controller has continuously controlled that permanent since the beginning of his or her most recent turn.