mtg incubate cards Precon Upgrades for "Growing Threat" | Phyrexian Incubate deck suggestions : r/magicTCG

This means, no mono-colored cards or three-colored cards

Similarly, sagas always have three chapters, and adventures always have a power/toughness bar, even if you design a non-creature adventure

7 Runaway Steam-Kin Getting mana is nearly always a good thing, and Runaway Steam-Kin is a very good way to get a lot of mana

Modern Series Modern Disney cards include recent collaborations and standalone series like Disney Lorcana

Where We Are Now Double Major, The Apprentices Folly, Quantum Misalignments, and Irenicuss Vile Duplication are temporary producers, blips of spells that essentially allow you two of the same commander (and one of them with flying to boot)