I particularly love how it basically makes all your Equipment cards into mana rocks, but the really cool part of Urza is its activated ability, which is an improved Temporal Aperture, a nifty old artifact from Urzas Saga
The 2nd most iconic, to my mind, is the set from 2016, a few years ago
These types of spells were interesting in that they rewarded playing with multicolor cards, as a spell with both colors triggered twice
However, as I am limited to 10 for 10 cards, these are way out of my price range for this blog
(Until your next turn, they attack each combat if able and attack a player other than you if able.) Battalion Whenever this creature and at least two other creatures attack, for each opponent, goad up to one target creature that player controls
So there it is -- this is what I'm going to be remembering when sorting through all of the WAR spoilers