Sink into Stupor / Soporific Springs Sink into Stupor is a favorite card among blue mages with the ability to deal with spells on the stack and many sorts of permanents
You can play around Force Spike fairly easily but trying to have three spare mana after doing something useful is a tall order
Winds of Rath Winds of Rath needs a specific deck to work, but its often a powerful one-sided board wipe in decks that can meet the condition
Best High-Toughness Creature Payoffs Theres a surprising amount of support for high-toughness creatures, usually from sets that have this as a Limited archetype ( Crimson Vow , Dragons of Tarkir , Ravnica Allegiance ), or from Commander designs
MTG has many mechanics that revolve around artifact numbers and density, so we have not only affinity cards here, but also improvise, metalcraft, and other artifact-matters mechanics and cards