Would you please recommend a mana cost for a Boros enchantment with "If you would create one or more creature tokens that are attacking, for each of them, instead create three of that token, then untap one of them and remove it from combat"
Given it only interacts with other effects on its own my immediate gut impulse is 2RW.
Though I'd need to check the wording to see if these replaced copies are still sacrificed if the token creator expects to sacrifice them.