2008-04-01 : The mana can’t be spent to activate activated abilities of Elemental sources that aren’t on the battlefield (such as the reinforce ability of an Elemental card in your hand).

2008-04-01 : You can use the mana produced by Primal Beyond’s last ability to pay an alternative cost (such as evoke) or additional cost incurred while casting an Elemental spell. It’s not limited to just that spell’s mana cost.