[1] The name, the use of a d20 and a d4 and the adventuring party consisting of a fighter, a cleric, a rogue and a wizard are all references to the Dungeons & Dragons game
Control decks are usually much lighter on wincons and board presence, with more emphasis on interaction through counterspells, board wipes, and flash threats
The base level for cards like Rashmi, Eternities Crafter, Cosmic Crucible, and Arcane Bombardment is that you cast a spell during your turn, trigger these permanents, then pass and wait for your next turn to do it again
Their silver border and acorn stamp show that they cannot be used in any legal play
Bonus if your Commander pod has gotten Eldrazi heavy, you can do the classic tech of running all snow basics so your Extraplanar Lens only doubles your mana and not theirs
Aradara Express: Let's assume that a crew cost is equivalent to a mana cost since maybe you are tapping a 4 drop 4/4 to crew for 4