Reading another topic (https://apps.magicjudges.org/forum/topic/33954/) I remember the Sarkhan remind text… but I don't see the diferente among the two habilities.

Why Sarkhan, the Dragonspeaker “becomes a non-PW creature” but the animated Inkmoth Nexus “becomes an artifact creature land” by -1 of Tezzeret, Agent of Bolas??

Edited Iván R. Molia (March 7, 2017 05:47:04 AM)

Hi,

Let's take a look at what the previous rule (205.1a) says:

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.

Sarkhan's +1 says to make Sarkhan a creature. It doesn't say to retain it's previous types, so it doesn't. After Sarkhan's +1 ability resolves, Sarkhan is just a creature. This is different from the last part of 205.1b, because that only applies if the effect makes it an ‘artifact creature’. It does not apply if it's just making it a ‘creature’ or just an ‘artifact’, which is why Tezzeret's ability (which is making the artifact into an ‘artifact creature’) retains its previous types.

Nathan Long
Magic Rules NetRep