Undermountain Adventurer Taking the initiative is very good in 1v1 formats, to say the least
THE RUINOUS POWERS Sow discord and destruction for the glory of Chaos with commanders Abaddon the Despoiler and Belakor, the Dark Master
I doubt I got them all (I know I didn't get them all), but I wrote 15,000-plus words' worth of answers
I clearly wasnt alone in this line of thinking, because Black Market and Pawn of Ulamog saw an absolute ton of play during Commanders early years, and the former was actually a chase card for a while since its only printing was in Mercadian Masques prior to the release of Commander 2015
Whenever an opponent casts a spell, Kaervek the Merciless deals damage equal to that spells mana value to any target
Bring to Light is firmly in the latter category