Moritte of the Frost

If the copied permanent is affected by a type-changing effect, Moritte may enter the battlefield with different permanent types than the copied permanent currently has. Use the characteristics of Moritte as it enters the battlefield, not of the copied permanent, to determine whether it enters with an additional counter on it. Notably, if Moritte copies a permanent that's normally not a creature but has been made a creature by another effect, Moritte enters as a noncreature permanent that doesn't get +1/+1 counters or have changeling.

Moritte copies exactly what was printed on the original permanent (unless that permanent is copying something else or is a token; see below). It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it, whether it has any Auras and/or Equipment attached to it, or any non-copy effects that changed its power, toughness, types, color, and so on.

If an effect causes a creature with changeling to become a new creature type, it will be only that new creature type. It will still have changeling; the effect making it all creature types will simply be overwritten.

If the chosen permanent has {X} in its mana cost, X is considered to be 0.

The {S} symbol is a generic mana symbol. It represents a cost that can be paid by one mana that was produced by a snow source. That mana can be any color or colorless.

Snow is a supertype, not a card type. It has no rules meaning or function by itself, but spells and abilities may refer to it.