Reclamation Sage is a classic that helps destroy pesky enchantments and artifacts similar to the previously mentioned Nethroi, Apex of Death
It gets you Sol Ring or Mana Crypt
[6] Transformers consists of fifteen double-faced cards, each of which is a Legendary Artifact Creature on the front and a Legendary Artifact with the Vehicle subtype on the back (with the exception of Soundwave and Blaster, who lack the Vehicle artifact type for obvious reasons)
So, if some triggers go off between the resolution of Sundial of the Infinites ability and the beginning of the cleanup step, including those that trigger at the beginning of cleanup step, they all go onto the stack, the active player gets priority and then the usual chores
$30 is still quite expensive, but Ulamog is not seeing a ton of play in competitive formats
This evens out the playing field, replacing large Voltron creatures or aristocratic life drainers with manageable small tokens instead