As a result of these edge-case disagreements and the games breathtaking combination of longevity and publishing velocity, it is surprisingly challenging to answer what should be a fairly simple question
This link is by no means comprehensive, and I encourage you to browse the whole Imgur collection in its entirety, as well as Mike Linnemanns article Whats a Diptych? for further art historical context
Sacrifice one of the Wurm artifacts you've just made to the Krak-Clan Ironworks, and then use that four generic mana you've made to pay for Nim Deathmantle's trigger, targetting the Wurmcoil Engine in your graveyard
Notice it started in Mirrodin , the first set after the tribal block
When this card is sent from the field to the Graveyard: You can target 1 face-up monster your opponent controls
White technically got its first relentless creature in Templar Knight, but Hare Apparent hit the scene shortly after and gives players a much more realistic card to build-around, with a much bigger reward