How to beat 8-Cast in Legacy
Over the last 90 days of recorded Legacy matches, the decks with the best results against 8-Cast are Doomsday (80% over 5 matches) and Sultai Tempo (62% over 13 matches). Doomsday's 80% sits in a 95% range of 38%–96%, which is the range a 5-match sample actually supports. The decks with the best records against it most often carry Force of Negation, Barrowgoyf and Consign to Memory in the sideboard — those are their sideboards in general, not cards chosen for this matchup.
Best records against 8-Cast
Matches played in the last 90 days, from events that publish round-by-round pairings. Ranked by the bottom of each 95% range, not by the headline percentage, so a small sample cannot outrank a large one.
| Deck | Win rate vs 8-Cast | Record | Matches | Sample | 95% range |
|---|---|---|---|---|---|
| Doomsday | 80.0% | 4-1 | 5 | Low sample | 38%–96% |
| Sultai Tempo | 61.5% | 8-5 | 13 | Medium sample | 36%–82% |
- High sample · 20+ matches
- Medium sample · 8–19 matches
- Low sample · 5–7 matches
48 further pairings (92 matches) fall below the 5-match floor and are not given a percentage. Full history, retired archetypes included, is on 8-Cast's archetype page and in the Legacy matchup matrix.
What the decks that beat 8-Cast bring
Sideboard cards run by Doomsday, Sultai Tempo. This is not a sideboard guide for this matchup. We record who beat whom, not what either player boarded, so these are whole-sideboard frequencies across every matchup those decks play — a hint about the kind of card that punishes 8-Cast, not a list to bring in.
| Card | Decks running it | Average copies | Which decks |
|---|---|---|---|
| Force of Negation | 2 of 2 | 2.1 | Doomsday, Sultai Tempo |
| Barrowgoyf | 2 of 2 | 1.5 | Doomsday, Sultai Tempo |
| Consign to Memory | 2 of 2 | 1.3 | Doomsday, Sultai Tempo |
| Carpet of Flowers | 1 of 2 | 2.0 | Sultai Tempo |
| Pernicious Deed | 1 of 2 | 1.8 | Sultai Tempo |
| Force of Vigor | 1 of 2 | 1.5 | Sultai Tempo |
| Massacre | 1 of 2 | 1.5 | Sultai Tempo |
| Fatal Push | 1 of 2 | 1.3 | Doomsday |
| Orcish Bowmasters | 1 of 2 | 1.2 | Doomsday |
| Dauthi Voidwalker | 1 of 2 | 1.1 | Doomsday |
| Murktide Regent | 1 of 2 | 1.0 | Doomsday |
| Hydroblast | 1 of 2 | 1.0 | Sultai Tempo |
Average copies is expected copies per deck — average copies played multiplied by the share of that archetype's lists running the card — so a 4-of in half the lists reads as 2.0.
Decks 8-Cast beats
The other end of the same table. If you are choosing a deck to attack 8-Cast with, the record argues against these.
| Deck | Win rate vs 8-Cast | Record | Matches | Sample | 95% range |
|---|---|---|---|---|---|
| Grixis Tempo | 40.0% | 2-3 | 5 | Low sample | 12%–77% |
| Rakdos Reanimator | 40.0% | 2-3 | 5 | Low sample | 12%–77% |
- High sample · 20+ matches
- Medium sample · 8–19 matches
- Low sample · 5–7 matches
Questions
What beats 8-Cast in Legacy?
Across the last 90 days, Doomsday (80% over 5 matches) and Sultai Tempo (62% over 13 matches) hold the best recorded results against 8-Cast. Records come from events that publish round-by-round pairings, and both decks in a match have to be identified for it to count, so these are the pairings we can see rather than every match played.
What should I bring in against 8-Cast?
We do not have sideboard choices tied to individual matches, so this is not a sideboard guide. What the data supports is narrower: the 2 decks with the best records against 8-Cast — Doomsday and Sultai Tempo — most commonly run Force of Negation, Barrowgoyf, Consign to Memory, Carpet of Flowers and Pernicious Deed in their sideboards. Those are whole-sideboard frequencies across every matchup those decks play.
What does 8-Cast beat?
8-Cast's best recorded matchups over the same window are Grixis Tempo (60% across 5 matches) and Rakdos Reanimator (60% across 5 matches). If you are picking a deck to attack 8-Cast with, these are the ones the record argues against.
How reliable are these Legacy matchup numbers?
Not very, and the page says so per row rather than in aggregate. Every pairing shows its match count, its sample band and a 95% range; the strongest band we award is 20+ matches, which is still roughly a ±20-point range around the figure shown. Pairings under 5 matches are counted but never given a percentage — there are 48 of those for 8-Cast right now. Rankings use the bottom of each range rather than the headline percentage, so a small sample cannot outrank a large one it has not earned.
What period does this cover?
Matches played in the last 90 days, filtered on when each match was actually played. Archetypes that have dropped out of the Legacy metagame are excluded from the ranking — their historical records are still on 8-Cast's own archetype page and in the format matchup matrix.
What each number on this site measures, and where it is least reliable, is set out on the methodology page.