Roar of Final Moments

The next time a creature you control would die, exile it instead. If a creature is exiled in this way, search your library for a creature card with a converted mana cost of six or more, reveal it, and add it to your hands. Shuffle your library afterwards. Play with that card revealed in your hand.
When you cast a card revealed in your hand, you may exile Roar of Final Moments from your graveyard. If you do, put three +1/+1 counters on target creature you control as it resolves.