Tainted Observer 
| Deck name | Creator | Source |
|---|---|---|
| Tainted Observer Pauper Commander | Rephsel | Moxfield |
| Tainted Observer [Pauper EDH] | Xymox420 | Moxfield |
| Oil Spill Gone Wrong (PDH) | Sprout | Moxfield |
| Tainted Mushrooms | SeekerofKhorne | Moxfield |
| Toxic Observation | Fallen232 | Moxfield |
| Tainted Observer Standard PEDH | CoopaTroopa93 | Moxfield |
| Tainted Observer | Gurbangly | Moxfield |
| pEDH Tainted Observer poison/proliferate | aloBR | Archidekt |
| Section 8 | alavalley27 | Moxfield |
| Grafter Proliferation | Mattfu | Moxfield |
| Tainted Observer || Simic Jank Combo | Hell_Majesty | Moxfield |
| Tainted Observer | zacksquach | Archidekt |
| SlimeTime PDH | donglemysongle | Moxfield |
| Tainted Observer PDH | BankaiGenius | Moxfield |
| Tainted Pauper | CQCForce | Moxfield |
| PDH Simic Toxic Proliferate 2.0 | dexmistify | Moxfield |
| Proliferating Toxin | NeoZ13 | Moxfield |
| Tainted Observer | EvoFanatic | Archidekt |
| Tainted Observer's Chemical Warfare | Scarecrow1779 | Moxfield |
| Proferate | shadowranger000 | Archidekt |