Primalcrux

Creature — Elemental    (CMC:6)

Trample Chroma — Primalcrux's power and toughness are each equal to the number of green mana symbols in the mana costs of permanents you control.

When nature is backed into a corner, just like its children, it lashes out.

73 EVE • ENWayne Reynolds

™ & © 1993—2008 Wizards of the Coast

Legal in: Modern,Lorwyn-Shadowmoor Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Primalcrux {G}{G}{G}{G}{G}{G} Creature — Elemental Trample Chroma — Primalcrux's power and toughness are each equal to the number of green mana symbols in the mana costs of permanents you control. ★/★

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View this MTG card on Gatherer

8/1/2008
This will count the number of symbols in its mana cost while it's on the battlefield. The ability functions while it's in other zones, but since it isn't a permanent while in those zones it won't count itself.
8/1/2008
Chroma abilities check only mana costs, which are found in a card's upper right corner. They don't count mana symbols that appear in a card's text box.
8/1/2008
Chroma abilities count hybrid mana symbols of the appropriate color. For example, a card with mana cost  has two red mana symbols in its mana cost.

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