| Name | Edition | Colour | Type | Cost | Power | Rarity | $ |
|---|---|---|---|---|---|---|---|
| Overabundance | IN | Multi | Enchantment | 1RG | Rare | 2.67 | |
| Overbeing of Myth | EN | Multi | Creature - Spirit Avatar | (G/U)(G/U)(G/U)(G/U)(G/U) | */* | Rare | 1.22 |
| Overblaze | BK | Red | Instant - Arcane | 3R | Uncommon | 2.22 | |
| Overburden | PR | Blue | Enchantment | 1U | Rare | 2.87 | |
| Overeager Apprentice | OD | Black | Creature - Minion | 2B | 1/2 | Common | 0.12 |
| Overgrown Estate | AP | Multi | Enchantment | BGW | Rare | 2.40 | |
| Overgrown Tomb | RA | Land | Land - Swamp Forest | Rare | 11.33 | ||
| Overgrowth | SH | Green | Echt Land | 2G | Common | 2.76 | |
| Overgrowth | 9E | Green | Enchant land | 2G | Common | 2.97 | |
| Overgrowth | 10E | Green | Enchantment - Aura | 2G | Common | 0.11 | |
| Overlaid Terrain | NE | Green | Enchantment | 2GG | Rare | 2.78 | |
| Overload | IN | Red | Instant | R | Common | 3.25 | |
| Overmaster | TR | Red | Sorcery | R | Rare | 2.62 | |
| Override | MI | Blue | Instant | 2U | Common | 2.08 | |
| Overrule | DI | Multi | Instant | XWU | Common | 3.37 | |
| Overrun | OD | Green | Sorcery | 2GGG | Uncommon | 1.19 | |
| Overrun | TP | Green | Sorcery | 2GGG | Uncommon | 3.33 | |
| Overrun | AT | Green | Sorcery | 2GGG | Uncommon | 11.61 | |
| Overrun | 10E | Green | Sorcery | 2GGG | Uncommon | 1.29 | |
| Oversold Cemetery | ON | Black | Enchantment | 1B | Rare | 4.59 | |
| Oversoul of Dusk | SM | Multi | Creature - Spirit Avatar | (G/W)(G/W)(G/W)(G/W)(G/W) | 5/5 | Rare | 5.43 |
| Overtaker | MM | Blue | Creature - Spellshaper | 1U | 1/1 | Rare | 2.60 |
| Overtaker (Prerelease) | P | Blue | Creature - Spellshaper | 1U | 1/1 | Rare | 13.45 |
| Overwhelm | RA | Green | Sorcery | 5GG | Uncommon | 2.82 | |
| Overwhelming Forces | P3K | Black | Sorcery | 6BB | Rare | 28.28 | |
| Overwhelming Instinct | ON | Green | Enchantment | 2G | Uncommon | 2.17 | |
| Overwhelming Intellect | SK | Blue | Instant | 4UU | Uncommon | 0.18 | |
| Ovinize | PC | Blue | Instant | 1U | Uncommon | 0.21 | |
| Ovinomancer | VI | Blue | Summon Sorcerer | 2U | 0/1 | Uncommon | 2.71 |
| Ovinomancer | TSS | Blue | Creature - Human Wizard | 2U | 0/1 | Uncommon | 3.64 |