mtg knight cards Knight-Errant of Eos | March of the Machine each opponent loses 1 life and you gain 1 life Summon: Knights of Round |

They are perhaps the most important tool for being reliably unfair, but there are several tutor variants in the Cube with various restrictions and drawbacks

The second was a rare cycle of dual lands that enter tapped unless you revealed a card of the appropriate creature type

Revenge of Ravens can be a very effective method of draining life from your opponents, especially against decks that create wide board states

For this list, Im not considering cards that turn into dragons or double-faced cards/sagas

Your best cards tend to be commons, which are Spellgorger Weird, Goblin Wizardry (which creates two Prowess creatures and happens to trigger Prowess as well), Opt and Crash Through

Opponents in a Commander game will almost always have something they would rather be doing with their mana rather than paying Smothering Tithe's tax