How are spells with 'X' in their CMC checked on the stack? Example: casting Sphinx's Revelation and paying 5 for the 'x'. Is this spell's CMC 8 on stack?
The value of X while the spell is on the stack is the value that was paid for X. So the CMC of Sphinxβs Revelation while itβs on the stack is 8 if you paid 5 for X.
The value of X everywhere except on the stack is always 0.










