Call of the Wild + Mortuary + Phyrexian Altar + Myr Battlesphere
Call of the Wild
Mortuary
Phyrexian Altar
Myr Battlesphere
Infinite colored manaInfinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite self-millPut all creature cards from your library onto the battlefield
How it works
Activate Phyrexian Altar by sacrificing Myr Battlesphere, adding .
Myr Battlesphere dies, triggering Mortuary, putting Myr Battlesphere on top of your library from your graveyard.
Activate Call of the Wild by paying 2, revealing Myr Battlesphere from the top of your library and putting it onto the battlefield.
Myr Battlesphere enters the battlefield, creating four 1/1 Myr artifact creature tokens.
Activate Phyrexian Altar three times by sacrificing three Myr tokens, adding 2.
Repeat.
Once you have infinite mana, you may activate Call of the Wild's ability to put all creature cards from your library onto the battlefield.