When Enchanting Enchantress enter the battlefield choose a non-aura white or green enchantment you own from outside the game.
Enchanting Enchantress's power and toughness are equal to that enchantment's converted mana cost and Enchanting Enchantress has any effects that enchantment has as static abilities.
Created for Challenge # 045.
Impressively, the only options that'll even make this 7/7 are Divine Intervention or Debtors' Knell. Neither of which does anything else because they don't have relevant static abilities (only triggered abilities). There are lots of 6s though, so I guess this fits the terms of the challenge in that it's probably a 6/6 for 3 mana.
(One of the best options may be True Conviction. That's a jolly good static ability to get for 3 mana.)
:)
I don't think "static but not triggered" is quite right. Am I right that if I choose Ritual of Subdual, I get a 6/6, armageddon, but don't have to pay the cumulative upkeep? And if I choose Transcendence, I get "You don't lose the game for having 0 or less life" but not either of the other two abilities? OK, Platinum Angel wasn't broken, but this would be a 3-mana 6/6 not a 7-mana 4/4 :)