Mikaeus, the Unhallowed + Mindless Automaton + Doubling Season + 1 more
Infinite card draw, Infinite draw triggers, Near-infinite colored mana, Near-infinite death triggers, Near-infinite ETB, Near-infinite LTB, Near-infinite sacrifice triggers
Activate Mindless Automaton's second ability by removing two +1/+1 counters from it, causing you to draw a card.
Repeat step 1 until Mindless Automaton has zero +1/+1 counters on it.
Activate Phyrexian Altar by sacrificing Mindless Automaton, adding one mana of any color.
Mindless Automaton dies, triggering its undying ability, returning it from your graveyard to the battlefield with a total of six +1/+1 counters on it.
Repeat.
Component Cards
How It Works
Activate Mindless Automaton's second ability by removing two +1/+1 counters from it, causing you to draw a card.
Repeat step 1 until Mindless Automaton has zero +1/+1 counters on it.
Activate Phyrexian Altar by sacrificing Mindless Automaton, adding one mana of any color.
Mindless Automaton dies, triggering its undying ability, returning it from your graveyard to the battlefield with a total of six +1/+1 counters on it.
Repeat.