What happens if I dragon form a token to make it 5 might then attached a shady Spectacles and make it 10 might. How much might does it have. What of then salvage kills the Spectacles. How much might then

While Shady Spectacles is attached, the token has 10 Might. After Salvage kills the Spectacles, it drops back to 5 Might (while Dragon Form is still active), then to its printed Might at end of turn.

Quick note: Shady Spectacles doesn't add +5 — it makes the equipped unit a copy of a friendly unit you choose, so the "10" comes from that unit's Might (its copyable traits, not temporary buffs on it).

Both Dragon Form's "base Might becomes 5 this turn" and the Spectacles copy effect apply in the Trait-Altering layer. The copy effect has the later timestamp, so it overrides Dragon Form and the token sits at 10 (Rule 480). When Salvage kills the gear, the copy effect ends — it only lasts "for as long as this is attached" — so the layers re-evaluate and Dragon Form's base-5 setting is the only one left. When the turn ends, the token reverts to its own printed Might.