CardName: Ritualistic Orgy
Cost: {2}{R}
Type: Sorcery
Pow/Tgh: /
Rules Text: Collaborate (When you cast this spell you may tap any number
of creatures you control).
Add {R}{R}{R}{R} to your mana pool. Then add {R} for each
creature that collaborated.
Flavour Text:
Set/Rarity: temporary storage None
Ritualistic Orgy
Sorcery
Collaborate (When you cast this spell you may tap any number of creatures you control).
Add to your mana pool. Then add for each creature that collaborated.
Going back to the collaborate concept I think it can be worded to remove X and give the same results.
Limited design space is still an issue however. In spite of that, it could still potentially exist in a small set I believe.