Its flexible, but may need an external centerpiece
When rules issues arise, they get passed along to the Rules Team to come up with an official answer
One of the very few spells that isn't a cheap damage dealing dork or a burn spell that red deck wins will play
You can sacrifice any creature you control that dealt damage this turn to pay Treacherous Greed's additional cost, even if the permanent it dealt damage to is no longer on the battlefield or the player it dealt damage to is no longer in the game
For example, if the planeswalker enters the battlefield during combat, there will be an opportunity for your opponent to remove it before you can activate one of its abilities
The ratios here are very impressive: the deck runs a TON of 2mv ramp cards, which is exactly what a Superfriends deck wants because you need to get your planeswalkers out on the battlefield asap to start generating value and hopefully get ahead of potential attackers
