pokemon trading card game x and y TCG: & while the back displays Xerneas and Yveltal Ultra Pro -Pokemon X &

Enchantment - Class Monstrous Vortex Whenever you cast a creature spell with power 5 or greater, discover X, where X is that spell's mana value

There are at least occasions you may elect to Tell Time over an Impulse

It gains "This creature attacks each combat if able" and "When this creature deals combat damage to a player, sacrifice it."Mayhem P/T Set Number 125 Language Italiano Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (9/19/2025) If a card in a graveyard has in its mana cost, X is 0 when determining its mana value

It is also far harder to engineer added advantage out of Counterspell than it is for all of that list except for Mana Leak