This is a compact combo deck built around two-card instant-speed kills that exile your library and win immediately. Demonic Consultation or Tainted Pact empties your deck, then Thassa's Oracle enters and checks your devotion to blue — if you've exiled enough, you win on the spot. The deck chains cheap spells (Lotus Petal, Mana Vault, Sol Ring) to generate the mana and storm count needed to find and cast these pieces by turn 3 or 4. Talion, the Kindly Lord sits in the command zone as a secondary payoff: whenever an opponent casts a spell matching your chosen number, you draw a card and they lose 2 life, turning a long game into a clock if the combo doesn't fire. The entire shell is built to either win through the library-exile combo or, if disrupted, grind out card advantage and life drain until the table falls.
Commander contract: Talion triggers whenever an opponent casts a spell with mana value, power, or toughness equal to your chosen number — you draw a card and they lose 2 life. The deck exploits this by running 29 cheap spells (mostly mana value 1–2) so you can choose a number that fires repeatedly; each trigger replaces itself and drains the table, turning Talion into a slow but inevitable clock. Fast mana shell: Sol Ring, Mana Vault, and Lotus Petal generate three to four mana on turn 1, letting you cast Talion by turn 2 and still hold up interaction or tutors. Tutor chain: Demonic Tutor and Diabolic Intent, plus 2 more tutors find your combo pieces or payoffs. Demonic Consultation and Tainted Pact are both tutors themselves — they search your library for a card name, and if you name a card you don't own, you exile your entire deck, which triggers Thassa's Oracle's win condition immediately. The Thassa's Oracle line wins by exiling your library, so graveyard hate does not stop it — the real answers are countering Thassa's Oracle and countering Demonic Consultation or Tainted Pact, plus hand disruption before you assemble. It enters, counts your blue devotion (usually 4–6 from permanents), sees your library is empty, and you win. Backup payoffs: Doctor Doom, Unrivaled wins by tapping to draw until your library is empty, then wins on the spot. The Dramatic Reversal + Isochron Scepter loop produces Infinite magecraft triggers, Infinite mana nonland permanents you control can produce, Infinite storm count, Infinite untap of nonland permanents you control on its own — it needs a separate finisher to actually win. Protection layer: Counterspell, Pact of Negation, and Force of Will (which pitches a blue card from hand, so it's free ~100% of the time here) defend the combo turn or protect Talion from removal.