| Rapid Hybridization (2 variants) | 1126 |
| Rat Colony | 36 |
| Ravenous Chupacabra (2 variants) | 305 |
| Ravenous Chupacabra (2 variants) | 1764 |
| Ravenous Rotbelly | 849 |
| Razaketh, the Foulblooded (4 variants) | 2251 |
| Razaketh, the Foulblooded (2 variants) | 163 |
| Razaketh, the Foulblooded | 163★ |
| Read the Bones (2 variants) | 7066 |
| Read the Bones | 7069 |
| Read the Bones (2 variants) | 2566 |
| Reality Shift (2 variants) | 1781 |
| Reality Smasher (2 variants) | 1153 |
| Realms Uncharted (2 variants) | 1895 |
| Realmwalker (2 variants) | 1724 |
| Reaper King | 9 |
| Reaper King (2 variants) | 2170 |
| Reassembling Skeleton (2 variants) | 1406 |
| Reckless Endeavor (2 variants) | 2177 |
| Reckless Fireweaver | 1526 |
| Reckoner Bankbuster // Reckoner Bankbuster (2 variants) | 1967 |
| Reclamation Sage | 777 |
| Reconnaissance | 1575 |
| Reconnaissance | 1575★ |
| Reconnaissance Mission (2 variants) | 2535 |
| Red Mana | 7082 |
| Reflecting Pool | 1535 |
| Reflecting Pool | 1535★ |
| Reflector Mage (2 variants) | 1108 |
| Regal Caracal | 23 |
| Regisaur Alpha | 1393 |
| Regisaur Alpha | 1393★ |
| Regrowth | 866 |
| Regrowth | 7075 |
| Reki, the History of Kamigawa (2 variants) | 263 |
| Relentless Dead | 850 |
| Relentless Rats | 756 |
| Relentless Rats | 755 |
| Relentless Rats | 757 |
| Relentless Rats | 752 |
| Relentless Rats | 754 |
| Relic of Legends (2 variants) | 7109 |
| Reliquary Tower (2 variants) | 7104 |
| Reliquary Tower | 695 |
| Reliquary Tower | 1536★ |
| Reliquary Tower | 1536 |
| Remote Isle | 2162 |
| Repercussion (2 variants) | 1065 |
| Reprocess (2 variants) | 2107 |
| Resculpt (2 variants) | 2029 |