Mishra, Tamer of Mak Fawa + Void Maw + Myr Battlesphere + Phyrexian Altar

Mishra, Tamer of Mak Fawa
Void Maw
Myr Battlesphere
Phyrexian Altar

Requires
Myr Battlesphere in your graveyard. All other permanents on the battlefield. 1br available.
Steps
  1. Activate Myr Battlesphere's unearth ability by paying 1br, returning it from your graveyard to the battlefield with haste
  2. Myr Battlesphere enters the battlefield, creating four 1/1 Myr artifact creature tokens
  3. Activate Phyrexian Altar three times by sacrificing two Myr tokens and Myr Battlesphere, adding 1br
  4. Choose to exile Myr Battlesphere using Void Maw's replacement effect instead of its unearth replacement effect
  5. Activate Void Maw by putting Myr Battlesphere from exile into your graveyard, giving Void Maw +2/+2 until end of turn
  6. Repeat
Results
Infinite creature tokens. Infinite colored mana. Infinitely large Void Maw until end of turn. Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers.