. The values of an object's characteristics are determined by starting with the actual object. For a card, that means the values of the characteristics printed on that card. For a token or a copy of a spell or card, that means the values of the characteristics defined by the effect that created it. Then all applicable continuous effects are applied in a series of layers in the following order:

613.1a Layer 1: Copy effects are applied. See rule 706, "Copying Objects."

613.1b Layer 2: Control-changing effects are applied.

613.1c Layer 3: Text-changing effects are applied. See rule 612, "Text-Changing Effects."

613.1d Layer 4: Type-changing effects are applied. These include effects that change an object's card type, subtype, and/or supertype.

613.1e Layer 5: Color-changing effects are applied.

613.1f Layer 6: Ability-adding and ability-removing effects are applied.

613.1g Layer 7: Power- and/or toughness-changing effects are applied.

613.2. Within layers 1-6, apply effects from characteristic-defining abilities first (see rule 604.3), then all other effects in timestamp order (see rule 613.6). Note that dependency may alter the order in which effects are applied within a layer. (See rule 613.7.)

613.3. Within layer 7, apply effects in a series of sublayers in the order described below. Within each sublayer, apply effects in timestamp order. (See rule 613.6.) Note that dependency may alter the order in which effects are applied within a sublayer. (See rule 613.7.)

613.3a Layer 7a: Effects from characteristic-defining abilities are applied. See rule 604.3.

613.3b Layer 7b: Effects that set power and/or toughness to a specific number or value are applied.

613.3c Layer 7c: Effects that modify power and/or toughness (but don't set power and/or toughness to a specific number or value) are applied.

613.3d Layer 7d: Power and/or toughness changes from counters are applied. See rule 121, "Counters."etc...

305.7 Si un effet fixe le sous-type d'un terrain en un ou plusieurs types de terrain de base, ce terrain perd son ancien type de terrain.

205.1a Some effects set an object’s card type. In such cases, the new card type(s) replaces any existing card types. Counters, effects, and damage marked on the object remain with it, even if they are meaningless to the new card type. Similarly, when an effect sets one or more of an object’s subtypes, the new subtype(s) replaces any existing subtypes from the appropriate set (creature types, land types, artifact types, enchantment types, planeswalker types, or spell types). If an object’s card type is removed, the subtypes correlated with that card type will remain if they are also the subtypes of a card type the object currently has; otherwise, they are also removed for the entire time the object’s card type is removed. Removing an object’s subtype doesn’t affect its card types at all.

Enfin une réponse censée...

(1)CENSÉ, -ÉE adj. XVIe siècle. Participe passé de l'ancien verbe censer, emprunté du latin censere, « estimer, juger bon, considérer comme ».
Qui est supposé, présumé, réputé faire, avoir fait, devoir faire quelque chose. Je suis censé partir demain. Que suis-je censé faire ? Nul n'est censé ignorer la loi.