Does a type-changing effect that removes creature type apply before or after a lord that boosts creatures of that type?

Type-changing effects and stat-boosting effects from lords both operate in Magic's layer system (CR 613). Type changes are applied in Layer 4 (type/subtype), while continuous +X/+X boosts from lords are applied in Layer 7b (power/toughness). Because layers are applied sequentially, Layer 4 always resolves before Layer 7b.

This means: if a creature loses its type (e.g., loses the Goblin subtype) in Layer 4, then when the game reaches Layer 7b, that creature no longer qualifies as a Goblin, so a Goblin lord's bonus does not apply to it. The type change effectively prevents the lord bonus from being granted, regardless of which effect entered the game first (CR 613.1, 613.3, 613.5).

Timestamp order only matters when two effects operate within the same layer (CR 613.7). Since type-changing (Layer 4) and lord power/toughness boosts (Layer 7b) are in different layers, the layer sequence itself determines the outcome — timestamp is irrelevant between these two specific effects.

Example: You control a Goblin Chieftain (all Goblins get +1/+1) and a Goblin token. Your opponent activates an effect that makes the token lose all subtypes until end of turn. In Layer 4, the token loses the Goblin subtype. Then in Layer 7b, the game checks Goblin Chieftain's bonus — the token is no longer a Goblin, so it gets no bonus. The token does not receive +1/+1.

Conversely, if the lord gives a static bonus tied to a characteristic-defining ability or if the lord itself grants the creature type, dependency rules (CR 613.8) might alter evaluation order — but in the standard lord-vs-type-removal scenario, Layer 4 always precedes Layer 7b.