At the beginning of your upkeep, Master of the Wild Hunt triggers, creating a copy of Timestream Navigator.
Activate the oldest Timestream Navigator, paying {2}{U}{U} and putting Timestream Navigator on the bottom of your library to take an extra turn after this one.
Pass the turn.
Repeat.

Infinite turns

Lock

Esix, Fractal Bloom

Timestream Navigator

Master of the Wild Hunt

Activate Master of the Wild by tapping it, tapping all untapped Wolves you control, then causing them to deal damage to the creature with Druid's Call attached equal to their power, then having the creature with Druid's Call attached deal damage to the Wolves equal to its power.
Druid's Call triggers, creating a number of 1/1 Squirrel creature tokens equal to the damage dealt.
When the Squirrel(s) enter the battlefield, Intruder Alarm triggers that many times, untapping all creatures.
Repeat.

Infinite creature tokens

Infinite ETB

Infinite mana creatures you control can produce

Infinite untap of creatures

Druid's Call

Intruder Alarm

Eldrazi Monument

Avacyn, Angel of Hope

Combos with "Master of the Wild Hunt"