The Mythic Invitational features the debut of the Duo Standard format, where each player brings two decks to use every round. Here's how the field of 64 players (128 decks) breaks down.
Note that players had the option to use the same deck in both their Deck A and Deck B slots.
| Archetype | Number | % |
| Esper Control | 36 | 28.13% |
| Mono-White Aggro | 27 | 21.09% |
| Mono-Red Aggro | 17 | 13.28% |
| Esper Acuity | 9 | 7.03% |
| Gruul Warriors | 6 | 4.69% |
| Temur Reclamation | 6 | 4.69% |
| Gr Aggro | 5 | 3.91% |
| Golgari Explore | 4 | 3.13% |
| Rb Spectacle | 4 | 3.13% |
| Selesnya Tokens | 3 | 2.34% |
| Jund Warriors | 2 | 1.56% |
| Mono-Green Aggro | 1 | 0.78% |
| Grixis Midrange | 1 | 0.78% |
| Gruul Dinos | 1 | 0.78% |
| Gu Disruptive Aggro | 1 | 0.78% |
| Mono-Blue Tempo | 1 | 0.78% |
| Naya Angels | 1 | 0.78% |
| Rakdos Midrange | 1 | 0.78% |
| Sultai Explore | 1 | 0.78% |
| Wr Reinforcements | 1 | 0.78% |