Boon of Mystic Fate 2WR
Enchantment - Aura R
Enchant Child creature
When ~ enters the battlefield, exile an instant or sorcery card from your hand.
Whenever enchanted creature attacks or blocks, it gets +3/+3 and gains indestructible until end of turn.
If enchanted creature would deal combat damage equal to or greater than the mana value of the exiled card, you may instead create a copy of that card and cast the copy without paying its mana cost.