Artifacts / Colorless Spells Starting off with artifacts and colorless spells seems like the most obvious, as every deck runs them
Small margins matter less when the price of the item is in the thousands or tens of thousands
Later we'd get the pricey Shifting Loyalties, or the flexible but pricey Shifting Loyalties
So the search box understands queries like: draw a card finds every cantrip, every wheel, every then draw tag-on destroy target creature covers single-target removal at every colour and cost enters the battlefield surfaces value-engine ETB triggers whenever you cast for cast-trigger payoffs (storm, prowess, magecraft) indestructible for every card with the keyword and every card that grants it Combining filters Filters AND together, so each one you add narrows the result set
The Yield to All button will appear when two or more triggers are on the stack
While massive Pokmon V gives two prize cards when knocked out, a deck using Togedemaru will only be giving a single prize at most, and oftentimes escaping from battles totally unscathed thanks to its effect