Merge

You can merge two or more permanents via the Mutate keyword ability.

Rules
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Rulings

 * The merged creatures have all of the characteristics of the topmost card or token, and it also has all abilities from its other cards and tokens.
 * The merged creature is the same creature it was before the merge, so any Auras or counters that were on it remain on it, it remains tapped if it was tapped, it's still attacking if it was attacking, and so on. If it's been under its controller's control since their most recent turn began, it can attack and undefined.
 * The characteristics of the combined merged creature are copiable.
 * The merged creature is a token if its topmost object is a token. If its topmost object is a card, it's a non-token creature, even if it contains a token.
 * If the merged creature has any abilities referring to it by name, such as that of Phase Dolphin, it means "this creature," even if mutating causes it to have a new name.
 * If a creature that's a copy of another creature mutates, the characteristics it gains from mutating apply after applying the copy effect.