Fluros’s middle ability triggers only once if you cast a creature or Vehicle spell with power and toughness both equal to the chosen number.
2022-10-07 • wotc
Fluros’s middle ability will overwrite any previous effects that set the target’s power and toughness (if any) to specific numbers. Effects that otherwise modify its power and toughness will still apply no matter when they took effect. The same is true for +1/+1 counters.
2022-10-07 • wotc
If Fluros’s middle ability causes a Vehicle to become an artifact creature, it doesn’t count as “crewing” that Vehicle for any ability that would trigger off of a Vehicle becoming crewed. That Vehicle will become an X/X artifact creature, not whatever its printed power/toughness is.
2022-10-07 • wotc
Even in an Un- game, you must choose 0 or a positive integer. This is a change from previous Un- rules.
2022-10-07 • wotc