mtg pump cards Spells Nobody Will See Coming Prey's Vengeance - Instant -

If a card in a graveyard has in its mana cost, X is 0 when determining its mana value

So you can do this at any time, transferring the +1/+1 counter and the Buster Sword to Cloud

Because decks with Gaeas Cradle tend to search for Gaeas Cradle pretty reliably and you can assemble this combo whenever you get a witness with Cradle and enough creatures if youve already cast Snap, I try to play Snap as one of my interactive spells in any deck with Gaeas Cradle

Creature Grenade deals 5 damage to target creature or player

The same is true if a prepared creature becomes a copy of something else, even if it's then a permanent without a prepare spell