For seven mana, Sire of Seven Deaths elegantly has seven keywords, is a 7/7, and the Ward cost is a whopping seven life
Six mana may be a lot, but artifact decks often have ways to create a lot of it pretty easily
Basim Ibn Ishaq is a Dimir (blue/black) commander that has useful effects that encourage the usage of historic spells to get the most out of his abilities
Nazar, the Velvet Fang -- Although the card draw is nice, the color identity and mana cost limit this card's potential
What it lacks in compatibility and customization is made up for in the variety of play modes and the ability to turn your unwanted cards into resources
It also counters a spell, but instead of hurting your opponent, it gains its caster three life