Deal combat damage to an opponent using Calix.
Calix's second ability triggers, creating two token copies of Three Blind Mice.
The Three Blind Mice tokens enter the battlefield with two lore counters on them due to Doubling Season, triggering their first and second chapter abilities, as well as Calix's first ability twice.
Resolve both Calix triggers, putting two +1/+1 counters on a creature you control.
Resolve the first Three Blind Mice triggers, creating four 1/1 Mouse creature tokens.
Resolve the next Three Blind Mice trigger, creating two token copies of a Three Blind Mice token.
Repeat from step 3.
Once you have infinite Three Blind Mice triggers, you may use them to copy any token(s) you control.

Infinite +1/+1 counters

Infinite copies of tokens you control

Infinite creature tokens

Infinite ETB

Infinite Three Blind Mice tokens

Calix, Guided by Fate

Three Blind Mice

Doubling Season

Deal combat damage to an opponent using Calix.
Calix triggers, creating a token copy of Three Blind Mice.
The Three Blind Mice token enter the battlefield with two lore counters on them due to its read-ahead ability, creating a token copy of the Three Blind Mice token.
Repeat step 3.

Barbara Wright

Deal combat damage to an opponent using Calix.
Calix's second ability triggers, creating a token copy of Three Blind Mice.
The Three Blind Mice token enters the battlefield with two lore counters on it due to Vorinclex, triggering its first and second chapter abilities, as well as Calix's first ability.
Resolve the Calix trigger, putting a +1/+1 counter on a creature you control.
Resolve the first Three Blind Mice trigger, creating a 1/1 Mouse creature token.
Resolve the next Three Blind Mice trigger, creating a token copy of the Three Blind Mice token.
Repeat from step 3.

Vorinclex, Monstrous Raider

Cause a permanent to enter the battlefield under your control.
Calix's first ability triggers, putting a +1/+1 counter on Scurry Oak.
Scurry Oak triggers, creating a 1/1 Squirrel creature token that is also an enchantment due to Enchanted Evening.
Repeat from step 2.

Infinite +1/+1 counters on Scurry Oak

Scurry Oak

Enchanted Evening

Cause a permanent to enter the battlefield under your control.
Calix's first ability triggers, putting a +1/+1 counter on Herd Baloth.
Herd Baloth triggers, creating a 4/4 Beast creature token that is also an enchantment due to Enchanted Evening.
Repeat from step 2.

Infinite +1/+1 counters on Herd Baloth

Herd Baloth

Cast Rancor by paying {G}, attaching it to any other creature you control.
When Rancor enters the battlefield, Calix's first ability triggers, putting a +1/+1 counter on Herd Baloth.
Herd Baloth triggers, creating a 4/4 Beast creature token.
Activate Phyrexian Altar by sacrificing the creature with Rancor attached, adding {G}.
Rancor triggers, returning it from your graveyard to your hand.
Repeat.

Infinite death triggers

Infinite LTB

Infinite sacrifice triggers

Infinite storm count

Rancor

Phyrexian Altar

Cast Rancor by paying {G}, attaching it to any other creature you control.
When Rancor enters the battlefield, Calix's first ability triggers, putting a +1/+1 counter on Scurry Oak.
Scurry Oak triggers, creating a 1/1 Squirrel creature token.
Activate Phyrexian Altar by sacrificing the creature with Rancor attached, adding {G}.
Rancor triggers, returning it from your graveyard to your hand.
Repeat.

Combos with "Calix, Guided by Fate"