Activate Hardened Tactician by paying {1} and sacrificing a creature token.
When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token and a 1/1 Thopter artifact creature token.
Resolve the Hardened Tactician ability, causing you to draw a card.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Repeat

Infinite card draw

Near-infinite creature ETB

Infinite draw triggers

Near-infinite creature LTB

Near-infinite death triggers

Near-infinite creature sacrifice triggers

Hardened Tactician

Pitiless Plunderer

Stridehangar Automaton

Activate Hardened Tactician by paying {1} and sacrificing a token.
If you sacrificed a creature token, Pitiless Plunderer triggers, and The Watcher's second ability triggers if the creature token was a Tentacle.
Resolve the Pitiless Plunderer trigger, if applicable, creating a Treasure token.
Resolve the Watcher trigger, if applicable, untapping a Kraken and putting a stun counter on up to one nonland permanent.
Resolve the Hardened Tactician ability, causing you to draw a card.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
If you control a Treasure, activate it by tapping and sacrificing it, adding {1}.
Repeat.

Near-infinite untap of some creatures you control

The Watcher in the Water

Activate Hardened Tactician by paying {1} and sacrificing a token, causing you to draw a card.
The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
Activate the Insect by tapping it, adding {G}.
Repeat.

The Locust God

Jaheira, Friend of the Forest

Activate Hardened Tactician by paying {1} and sacrificing a token.
If you sacrificed a Tentacle, The Watcher's second ability triggers if the creature token was a Tentacle, untapping a Kraken and putting a stun counter on up to one nonland permanent.
Resolve the Hardened Tactician ability, causing you to draw a card.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
When the Tentacle enters the battlefield, Mana Echoes triggers, adding {C} for each Tentacle you control.
Repeat.

Near-infinite colorless mana

Mana Echoes

Activate Hardened Tactician by paying {1} and sacrificing a token, causing you to draw a card.
The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
When the Insect enters the battlefield, Mana Echoes triggers, adding {C} for each Insect you control.
Repeat.

Activate Hardened Tactician by paying {1} and sacrificing a token.
If you sacrificed a creature token, Pitiless Plunderer triggers, creating a Treasure token.
Resolve the Hardened Tactician ability, causing you to draw a card.
The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
If you control a Treasure, activate it by tapping and sacrificing it, adding {1}.
Repeat.

Activate Hardened Tactician by paying {1} and sacrificing a token.
If you sacrificed a Tentacle, The Watcher's second ability triggers if the creature token was a Tentacle, untapping a Kraken and putting a stun counter on up to one nonland permanent.
Resolve the Hardened Tactician ability, causing you to draw a card.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
Activate the Tentacle by tapping it, adding {G}.
Repeat.

Combos with "Hardened Tactician"