Any non-equipment artifact and non-aura enchantment you have that has a mana value of 4 or more become a 4/4 elemental with indestructible, haste, and whenever they hit a creature, you draw a card
It seems better-suited for artifact decks than Cataclysmic Gearhulk, which often eats up a bunch of your material with its effect
MTG: A Grizzly Fate Top Five Bear Commanders You wont want to hibernate on these five MTG Bear Commanders
Some artifact payoffs, like Urza, Lord High Artificer and cards with affinity, might not care if the Opal taps for mana or not
Enchantment R 0213 TLE Standard Pioneer Alchemy Historic Timeless Competitive Brawl Historic Brawl Rare Avatar: The Last Airbender Eternal Constructed Standard Stats View More Constructed Stats Most Popular Standard Deck Creatures (24) 4x 4x 4x 4x 4x 4x (8) 4x 4x (4) 4x Land (24) 4x 4x 9x 7x View Decks with Allied TeamworkView Archetype
These are: Online card databases With a simple Google search, you can now have an idea of how much is a Pokemon card by looking for sites or downloading apps that show a definitive Pokemon card price list
