Activate a creature by tapping it, adding at least {U}.
Activate Harmonized Trio by tapping it and two other creatures you control, causing it to become prepared.
Cast a copy of Brainstorm by paying {U}.
Hermes triggers, creating a creature token.
When the creature token enters, Intruder Alarm triggers, untapping all creatures.
Resolve Brainstorm, causing you to draw three cards and put two cards from your hand onto the top of your library.
Repeat.

Infinite card draw

Infinite draw triggers

Near-infinite creature ETB

Near-infinite creature tokens

Near-infinite magecraft triggers

Near-infinite storm count

Near-infinite untap of all creatures

Intruder Alarm

Harmonized Trio // Brainstorm

Hermes, Overseer of Elpis

Activate The Tenth Doctor by paying {7}, removing all time counters from Reality Strobe.
Reality Strobe triggers, causing you to cast it from exile without paying its mana cost.
Hermes triggers, creating a creature token.
When the creature token enters, Mana Echoes triggers, adding {C} for each creature you control that shares a creature type with the token.
Resolve Reality Strobe.
Repeat.

Infinite creature ETB

Infinite colorless mana

Infinite creature tokens

Infinite magecraft triggers

Mass Land Denial

Return any number of permanents to their owner's hand

The Tenth Doctor

Mana Echoes

Reality Strobe

Cast Searing Touch with buyback by paying {R}. Electro, Blood Funnel and Hermes trigger.
Resolve the Electro trigger, adding {R}.
Resolve the Hermes trigger, creating a creature token.
Resolve the Blood Funnel trigger, causing you to sacrifice the creature token.
Resolve the Searing Touch spell.
Repeat.

Combos with "Hermes, Overseer of Elpis"