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Nightsky Mimic

Card Name

Nightsky Mimic

Mana Cost

1

Type

Creature – Shapeshifter

Rarity

Common

rules Text

Whenever you play a spell that's both white and black, Nightsky Mimic becomes 4/4 and gains flying until end of turn.

Flavor Text

A mimic need only touch a being to learn its shape, but touching usually leads to mauling and messily eating.

Legal Formats

Commander, Legacy, Modern, Pauper, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Pioneer, Standard

Rulings

(8/1/2008)
The ability triggers whenever you cast a spell that's both of its listed colors. It doesn't matter whether that spell also happens to be any other colors.
(8/1/2008)
If you cast a spell that's the two appropriate colors for the second time in a turn, the ability triggers again. The Mimic will once again become the power and toughness stated in its ability, which could overwrite power- and toughness-setting effects that have been applied to it in the meantime.
(8/1/2008)
Any other abilities the Mimic may have gained are not affected.
(10/1/2009)
The effect from the ability overwrites other effects that set power and/or toughness if and only if those effects existed before the ability resolved. It will not overwrite effects that modify power or toughness (whether from a static ability, counters, or a resolved spell or ability), nor will it overwrite effects that set power and toughness which come into existence after the ability resolves. Effects that switch the creature's power and toughness are always applied after any other power or toughness changing effects, including this one, regardless of the order in which they are created.