Doesnt matter what type- retreat cost is always paid in Colorless Energy (black star white background), so any Energy will do
However, if you look at the current oracle text for this card, Abrade and Frazzle are crossed out since theyve since been used as card names
We can be relatively sure theyre coming, but Im not sure how to capitalize on that financially at this point
About half of the time it did literally nothing because our opponent was at a high enough a life total they could just put whatever card Sin Prodder revealed in the graveyard at a very low cost
If youre not after specific cards, shop for expansion packs at reliable stores like Target, Walmart, and GameStop
With both requiring a mana to trigger, we do get diminishing returns from stacking up lots of these enchantments