Tayam, Luminous Enigma + Deadly Grub + Phyrexian Altar + Abzan Ascendancy

Tayam, Luminous Enigma
Deadly Grub
Phyrexian Altar
Abzan Ascendancy

Requires
Deadly Grub in hand. All other permanents on the battlefield. 5b available.
Steps
  1. Cast Deadly Grub by paying 2b
  2. Deadly Grub enters the battlefield with three time counters and a vigilance counter on it
  3. Activate Tayam by paying 3 and removing the three time counters from Deadly Grub
  4. Deadly Grub's vanishing ability triggers, holding priority, activate Phyrexian Altar by sacrificing Deadly Grub, adding 1
  5. Deadly Grub dies, triggering itself and Abzan Ascendancy
  6. Resolve the Deadly Grub trigger, creating a 6/1 Insect creature token
  7. Resolve the Abzan Ascendancy trigger, creating a 1/1 Spirit creature token
  8. Activate Phyrexian Altar twice by sacrificing the Insect and Spirit tokens, adding 2
  9. Resolve the Deadly Grub trigger from step 4, doing nothing since Deadly Grub is no longer on the battlefield
  10. Resolve the Tayam ability from step 3, causing you to mill three cards and return Deadly Grub from your graveyard to the battlefield
  11. Repeat from step 2
Results
Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite self-mill.