what determines the value of a pokemon card where to check values How Much Are Your Pokémon Cards Worth? Pokémon's 30th anniversary is here.

On ETB we may destroy any number of artifacts and/or enchantments with total mana value X or less, so it may become an artifact/enchantment wipe if we have enough mana to dump (in that case it also fills the role of a big drop and becomes a real threat)

1 Queza, Augur of Agonies

My piece of advice is that whenever you think a card has an interesting effect, pick it up even if there are cards that can do something similar better or even if you dont see immediate use

Finding one outside of Japan usually means paying a serious premium because they just do not circulate widely

Though there is more to the story

1 Atraxa, Praetors Voice Atraxa was once an angel from Mirrodin that resisted Phyrexias takeover