提灯亚龙

What happens when I play Transpositionist's activated ability choosing an empowered Gangplank, Naval with 6 [M]? Can I play Angler Wyrm?

Gangplank being returned to hand will be replaced with him being given +3 [M] this turn. You can play Angler Wyrm from hand with Transpositionist's activated ability.

Transpositionist returns a unit to hand and then references that unit's information. If the unit didn't change zones and it was a legal target as the instruction that targeted it was being processed, the activated ability will reference that unit's current information. Gangplank, Naval's current Might as it is referenced is 9 [M], allowing you to play a unit with 9 [M] or less.

Relevant rules: 359.3.e.13., 359.3.e.13.a.