You can get artifact tokens into play quite cheaply with either Will, Lithobraking, or Daretti, then cast Shape Anew or Reality Scramble to tutor it out for a devastating swing turn
Delirium Whenever a source you control deals noncombat damage to an opponent, if there are four or more card types among cards in your graveyard, this creature deals that amount of damage to target creature that player controls
Can you imagine if you could just play a Moat the turn before Teferi
Mother of Goons Necro-Impotence Persecute Artist Phyrexian Librarian Stop That Tainted Monkey Vile Bile Wet Willie of the Damned When Fluffy Bunnies Attack Working Stiff Zombie Fanboy Zzzyxas's Abyss Assquatch Blast from the Past
The seven-drop Spine of Ish Sah arrives and destroys any permanent from lands to battles
Sorin was a vampire who specialized in life-leeching magic, and as soon as the Eldrazi arrived on the plane he began sapping their strength