Does a 3-Might Mech token with Assault (making it 4 Might when conquering) reduce the cost by 4 when recycled with Rumble, Hotheaded's ability?

Ruling: Yes, when you recycle a unit as a cost for an ability like Rumble's, the ability "looks back" at the unit's characteristics immediately before it left the board, including any Assault bonuses. A 3-Might Mech with Assault active will reduce the cost by 4.

Sequence:

• Your Mech has 4 Might on the board (3 printed + 1 from Assault) when you activate Rumble's ability
• You recycle the Mech as a cost, moving it from the board to your deck
• The ability "looks back" at the unit's state immediately before it changed zones
• The cost reduction uses the Might value the unit had on the board (4), not just its printed value (3)

Nuances:

• The "look back" rule applies specifically when an ability moves something to a different zone as part of its cost or effect
• Assault bonuses remain active during Conquer triggers because the Attacker designation persists through combat resolution
• This interaction works because the recycling happens as a cost while the unit still has its board-state characteristics