Some Equipment creature cards in other sets have reconfigure, a different ability that attaches them to a creature
That said, Hearth Elemental or more accurately the adventure on Hearth Elemental, Stoke Genius does quite a good Breakthrough impression
Altar Ibn-La'Ahad Ankle Shanker Bone-Cairn Butcher Butcher of the Horde Caesar, Legion's Emperor Celes, Rune Knight Edgar Markov Fire Lord Zuko Ghen, Arcanum Weaver Isshin, Two Heavens as One Isshin, Two Heavens as One Jan Jansen, Chaos Crafter Jirina Kudro Kaalia of the Vast Kaalia, Zenith Seeker Kelsien, the Plague Kroxa and Kunoros Licia, Sanguine Tribune Mardu Roughrider Mardu Siegebreaker Mathas, Fiend Seeker Megatron, Tyrant Mr
The deck revolves around taking advantage of mechanics allowing you to play cards from exile, triggering Prosper's Pact Boon effect to flood the board with treasure tokens
This blade of Arthurian legend gives a creature +10/+0 and vigilance, and its cost of 12 mana is brought down by the total mana value of historic permanents you control