Narset Transcendent's -2 ability is its strongest, as it lets you get two casts of a spell for the price of one, since rebound lets you cast it again without paying its cost at the next upkeep
Cards like Fiery Emancipation, Thousand-Year Storm, and Niv-Mizzet, Parun can drop away with a touch of burn, and Izzet stalwarts like Goblin Electromancer, other spellslinger cards like Archmage Emeritus, and then a suite of blue countermagic can amp up the attack
True Friend is a very basic card since it has no extra trait or special ability that affects other cards, but it can be used to fill the player's inkwell
1 Traditional foil card from Masters of Evil 1 in 10 appear in surge foil
Destroy target creature, enchantment, or planeswalker