Combined with tapping and untapping effects like Merrow Reejerey, Surgespanner can create an insane amount of advantage very quickly

There are tons of cheap and effective artifact removal spells in reds arsenal such as: Shattering Spree Pay 1 red any amount of times and destroy that many target artifacts Embereth Shieldbreaker Its Adventure, Battle Display lets you destroy target artifact Abrade Destroy target artifact, or deal 3 damage to target creature You Find Some Prisoners Choose one: Destroy target artifact Exile 3 cards from target opponents library and chose 1 that you can play until the end of your next turn Shredded Sails Cycling 2 Choose one: Destroy target artifact Deal 4 damage to target creature with flying By Force Pay 1 red and X additional to remove X artifacts Raze the Effigy Choose one: Destroy target artifact Target attacking creature gets +2/+2 until end of turn Smash to Dust Choose one: Destroy target artifact Destroy target creature with defender Deal 1 damage to each creature you opponents control Shenanigans Destroy target artifact Dredge 1 Vandalblast Destroy target artifact you dont control Or pay its overload cost and destroy each artifact you dont control There are so many red artifact removal spells

1157981433.deviantart.com (The original source of very HQ artwork in Huangnans git.) 6
If they do, they put a rope counter on a creature they control
If you do, this attack does 70 more damage
Some of my favorite instants have been Necropotence (instantly win the game when it is played), Nevinyrral's Disk (instantly clear the board), and Squire (instantly have everyone in the room laugh at you)