However, the main reason is just that the characters simply arent as endearing as The Tenth Doctor, Karlach, Aragorn or The Swarmlord
These copies enter the battlefield tapped and attack your other opponents
Blue is the absolute best at copying creatures or artifacts, but despite being heavily instant and sorcery focused, cant copy those with a great efficiency
Thats right: you dont even have to spend mana to cast this as long as you control a commander, and it doesnt even have to be your own
Solid card, never bad, but nothing crazy
These play hand-in-hand, but ramp refers to an increased amount of mana available to you, whereas cost reduction just lets you allocate your resources a different way