Octavia, Living Thesis
Legendary Creature — Elemental Octopus
This spell costs 
less to cast if you have eight or more instant and/or sorcery cards in your graveyard.
Ward
Magecraft — Whenever you cast or copy an instant or sorcery spell, target creature has base power and toughness 8/8 until end of turn.
- CMC
- 10
- Mana cost
- Color identity
- U
- Rarity
- rare
- Set
- Outlaws of Thunder Junction Commander
- Price
- $0.60
- EDHREC rank
- #5581
Octavia, Living Thesis turns any instant or sorcery you cast into a free +1/+1 pump for a target creature until end of turn — and once your graveyard hits eight instants and sorceries, she costs zero mana to cast. Kenessos, Priest of Thassa can cheat her onto the battlefield for free the moment that threshold is met, making the payoff completely cost-free in the right shell.
Best Commanders
Commanders with the highest synergy
Kenessos, Priest of Thassa
Kenessos, Priest of Thassa can put Octavia, Living Thesis directly into play from the top of your library, bypassing her mana cost entirely and letting you deploy an 8/8 threat the instant your graveyard threshold is satisfied.
Talrand, Sky Summoner
Talrand, Sky Summoner already floods the board with 2/2 Drakes from every instant and sorcery, and each of those spells also triggers Octavia, Living Thesis to pump a creature — every cantrip does double duty.
Zethi, Arcane Blademaster
Zethi, Arcane Blademaster repeatedly recasts instants from exile, meaning Octavia, Living Thesis fires off a pump trigger every single time Zethi's ability resolves, turning the combat step into a shifting math problem for opponents.
Eris, Roar of the Storm
Eris, Roar of the Storm rewards you for casting spells from hand, generating Bird tokens and growing them — Octavia, Living Thesis slots in as a free 8/8 finisher that also syncs with the same spell-casting engine Eris, Roar of the Storm is already running.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | not legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | not legal |
| oathbreaker | legal |
Commander is the clear home for Octavia, Living Thesis — a 100-card singleton environment fills graveyards quickly, and spell-slinger commanders make the eight-card threshold routine rather than a stretch. The mechanic rewarding graveyard depth and the instant payoff on each spell cast both map perfectly to long, interactive games. In Legacy and Vintage, she's legal but irrelevant: a nine-mana 8/8 with a conditional cost reduction has no path to competitive play when those formats operate on entirely different axes. Oathbreaker could support her in the right 60-card spellslinger shell, though the compressed game length makes assembling eight instants and sorceries in the graveyard a real ask.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.60 bulk tier
At $0.60, Octavia, Living Thesis sits firmly in bulk territory, which is accurate — she's a casual Commander card with a narrow home and no competitive demand pulling her price up. That price is stable: there's no spike potential here, but she's also not going anywhere, so picking up copies for spell-slinger builds costs almost nothing.
Explore
Sources
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.