Startling Development 
Instant
Appears in 149 of 22,617 decks (0.7%).
Appears with these commanders:
| Commander | Decks | Synergy ↓ |
|---|---|---|
| Pteramander | 2 | 0.24 |
| Emrakul's Messenger | 2 | 0.24 |
| Fear of Failed Tests | 1 | 0.24 |
| Diviner Spirit | 1 | 0.19 |
| Mutagen Connoisseur | 1 | 0.16 |
| Feywild Caretaker | 1 | 0.16 |
| Beamsplitter Mage | 6 | 0.13 |
| Invisible Stalker | 5 | 0.11 |
| Viral Drake | 2 | 0.1 |
| Tomebound Lich | 1 | 0.08 |
| Lazotep Chancellor | 14 | 0.07 |
| Lorescale Coatl | 3 | 0.07 |
| Messenger Falcons | 1 | 0.07 |
| Sailors' Bane | 7 | 0.06 |
| Animating Faerie // Bring to Life | 3 | 0.06 |
| Slinn Voda, the Rising Deep | 1 | 0.06 |
| Reef Worm | 1 | 0.06 |
| The Mouth of Sauron | 2 | 0.05 |
| Tetsuko Umezawa, Fugitive | 7 | 0.04 |
| Worldheart Phoenix | 1 | 0.04 |
| Kediss, Emberclaw Familiar + Esior, Wardwing Familiar | 1 | 0.03 |
| Stormcatch Mentor | 1 | 0.03 |
| Rona, Sheoldred's Faithful | 2 | 0.02 |
| Johann, Apprentice Sorcerer | 2 | 0.02 |
| Najal, the Storm Runner | 1 | 0.02 |
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