what is a holofoil pokemon card

what is a holofoil pokemon card Can anyone tell me much about this card? I can find the regular on TCG but I can't find much about the stamped version? It has holo Pokeballs in the background Cosmos Holofoil (TCG) - Bulbapedia,

Name: what is a holofoil pokemon card Can anyone tell me much about this card? I can find the regular on TCG but I can't find much about the stamped version? It has holo Pokeballs in the background Cosmos Holofoil (TCG) - Bulbapedia,
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SKU: 26263411221

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Courser was awesome for me all weekend, but most of my losses were heavily influenced by mana-related issues

A PSA 10 stored carelessly can become a PSA 8

Turn it face up any time for its disguise cost.) When this creature is turned face up, you may choose new targets for any number of other spells and/or abilities