If your opponent is able to stabilize with bigger blockers you cant remove, the Frazzle-Cannon from said Invasion (along with other tribal effects like Sculpted Perfection) will help get you over the top
Tezzeret will be a Standard staple, but its unlikely to make an appearance in multiple archetypes due to the restrictive mana cost
A move that instructs you to "place damage counters" is an effect of an attack
While not all-stars in Commander, forgotten Reserved List cards like Flooded Shoreline still have potential
Two of the three cards from last week's post I've gotten from such playtesters, and the third came from Keith "The Misprint Guy" Adams about three years ago (after he had visited original playtesters himself)
If it was daytime during your turn, and you didnt cast any spells during that turn, it becomes night to start the next players turn