"Roll Call" Designs These cards specifically call out their colors (or associated basic land types) in their text box
I do have one issue with Savage BeatingSavage Beating in ElshaElsha specifically, however
Dice-roll commanders are a more recent addition to the Magic world, at least outside of Un-Sets
Oko's direct impact may not be flashy, but the opponent has to answer him - and all the time they're expending resources trying to remove the three-mana planeswalker, his controller can keep building up their own board, getting further and further ahead
Unwinding Clock and Drumbellower both make sure we always have blockers available and will enable us to reuse the protection of Skrelv, Defector Mite
Its cheap, you can split the payment across multiple turns, and any deck can exploit it due to its colorless identity