Instants and sorceries are one-off spells, and artifacts are magical items ranging from swords and chalices to helmets and even telescopes and masks
Infect doesn't defend creatures with too much countermagic anyway) Green Melira, Sylvok Outcast Nature's Claim Vines of Vastwood Fog Seal of Primordium Honorable mention: Choke It's a trap!: Beast Within (three mana for removal is way too expensive, especially if it's vulnerable to Skite/Blessing/Vines) Multicolored Deflecting Palm Zealous Persecution Fulminator Mage Izzet Staticaster Crackling Doom Honorable mention: Golgari Charm It's a trap!: Abrupt Decay (Too expensive, stopped by Skite/Vines/Blessing, can't even hit Inkmoth) Colorless Spellskite Chalice of the Void Engineered Explosives Ensnaring Bridge Pithing Needle Honorable mention: Platinum Angel It's a trap!: Relic of Progenitus (Shouldn't have to say this, but I see it all the time
Has the upside of being a Divination in a pinch
Affordable Affordable product well-suited for hobbyists and casual collectors
The Ruthless Pirate version of Captain Hook has Rush, a unique keyword that means that he can challenge another character the turn he comes out
Using an absurd amount of almost useless creatures like Saprolings to cast spells without having to use lands can give you a huge advantage