You can play Endrek fairly, by rationing your mana out, or not so fairly, by exploiting cards like Grave Pact
Partner (You can have two commanders if both have partner.) Whenever you cast a spell with the chosen word in its rules text, you draw a card and you lose 2 life
Once you get enough mana to unlock Fractured Realm, you can double all triggers from your permanents, be it enter triggers, death triggers, or attack triggers, and thats frankly unheard of in MTG
The passive tempt trigger when other legendary creatures enter the battlefield is also extremely powerful
These cards didnt play well either as constructed role-players or in casual decks that werent dedicated to splicing or spiritcraft
I quickly dismissed Darkblast, as the metagame was moving even farther away from relevant X/1 targets for it