Boros Challenger 
Synergy is a rough depiction of how well and uniquely a card pairs with a commander. Read more on the About page.
| # | Card | Synergy |
|---|---|---|
| 189 | Pack Attack | 0.16 |
| 189 | Inspiring Roar | 0.16 |
| 203 | Sky Crier | 0.15 |
| 203 | Gingerbrute | 0.15 |
| 203 | Hopeful Eidolon | 0.15 |
| 203 | Break Ties | 0.15 |
| 203 | Inspiring Overseer | 0.15 |
| 203 | Pilgrim's Eye | 0.15 |
| 203 | Light of Hope | 0.15 |
| 203 | Recruit the Worthy | 0.15 |
| 203 | Warded Battlements | 0.15 |
| 203 | Thraben Charm | 0.15 |
| 213 | Skyscanner | 0.14 |
| 213 | Big Score | 0.14 |
| 213 | Novice Inspector | 0.14 |
| 213 | Lightning Strike | 0.14 |
| 213 | Witch's Mark | 0.14 |
| 213 | Cave of Temptation | 0.14 |
| 219 | Goldhound | 0.13 |
| 219 | Forbidden Friendship | 0.13 |
| 219 | Emrakul's Hatcher | 0.13 |
| 219 | Spirited Companion | 0.13 |
| 219 | Springleaf Drum | 0.13 |
| 219 | Captain's Call | 0.13 |
| 219 | Prying Blade | 0.13 |