Cheap legendary creatures, like Skrelv, Defector Mite and Lotho, Corrupt Shirriff are also great for this
If you can activate its encore ability while multiple players are still in the game you'll be able to clear the board of any big threats, while gaining a significant chunk of life
Searches and fetches become useless with mills from Ashiok, Dream Render. Meanwhile, while Narset, Parter of Veils and Spirit of the Labyrinth locks card-draw limit for all parties
Mechtitan Core You can play Mechtitan Core with Thopter tokens or other things that you dont mind exiling, but the strength of the card is in bringing the other artifact creatures and/or Vehicles back onto the battlefield so you can have the tasty triggers
Either that, or just use it to punish other players while their current board is empty