The first artifact spell you cast each turn costs less to cast
Set Two Amethyst And Steel Starter Deck Rise Of The Floodborn Merlin and Madam Mim run away with the Amethyst portion of this starter deck
Llanowar Elves approaches that mark as well
Smee, Bumbling Mate Uncommon 185 Mufasa, Champion of the Pride Lands Rare 186 Nala, Fierce Friend Uncommon 187 Pyros, Lava Titan Rare 188 Razoul, Palace Guard Common 189 Robin Hood, Beloved Outlaw Common 190 Robin Hood, Champion of Sherwood Legendary 191 Sheriff of Nottingham, Corrupt Official Super Rare 192 Simba, Fighting Prince Super Rare 193 Simba, Rightful King Uncommon 194 Thaddeus E
For example, Arkanons 2nd place Stasis deck from WSK 2014 (courtesy of Mgs Old School Magic blog) looks very similar to this build, but a few card choices differentiate his Stasis deck and put it in a slightly different category of deck