mtg sacrifice deck commander Teysa Karlov Creature Tokens Magic looking for some deck building

Some amount of raw power is always good, but synergy is what can make a deck shine

Lutri, the Spellchaser was controversially (and correctly, in my opinion) banned from Commander on release as itd otherwise be an auto-include in any deck playing blue and red (almost any Commander deck fulfills the companion restriction, as this was clearly not designed for Commander)

The mill caused by the attack trigger can turn into massive resource advantage though is likely to help an opposing deck or two, but any scries or top deck manipulation goes awry fast with Locke

The top four eight (previously announced as 4, now officially 8 as was announced in the Lorecast, possibly more) players from each regional Challenge will earn the qualification for final North American or European Championships events