mtg expertise cards otag:expertise · Scryfall Magic: The Gathering Search You may cast a spell with mana value 5 or less from your hand without paying its mana cost. Yahenni's Expertise - Aether Revolt

If nine-mana Worldfire is okay, then ten-mana Sway of the Stars isnt so awful

It is a reasonably recovery tool and a reasonable card to close the game out on its own or with support

While its dangerous to risk them gaining a resource advantage this way, you still shouldnt be baited into making the first move if they can kill you in response

Limit Break Featuring Cloud from Final Fantasy VII as Cloud, Ex-SOLDIER, Limit Break is an Equipment-themed deck, that rewards you for making Cloud hit his 'limit break': power 7 or greater

Legion Lieutenant: Gives Edgar decks another low-cost Vampire lord

Finding a way to cast your best spell a zillion times, however, is always a big deal (especially since you get a LOT more mana for the next replication after each casting)