A question about spellcasting

[Fizban]

All the rolls are open ended?
Or only the spell's test, not including the Tax and other things?

- Fiz

[Kublai]

Only the roll made to cast the spell is open-ended. Any Tax tests or further Will tests (which are required to maintain a spell) are not open-ended.

[Fizban]

Thanks for help!

- Fiz