The majority of these decks are unlocked by pulling a specific card from the booster packs you open, so you might not have unlocked them all yet
Panharmonicon Panharmonicon is the go-to effect for doubling ETB triggers, whether from artifacts or creatures
Overall, Tyvar might not be the splashiest card, but the way he ticked every box I needed him to for a deck I was already playing puts him ahead of the competition for 2023
Several totally obvious comments on this ability : Opening hands is the cards the player decided to keep after all mulligans
When the 4 creatures are on the battlefield together, you activate Mirror Entity's ability for roughly a thousand times (or realistically as many times as u want) and X=0
I can also envision a Squirrel deck that uses some combination of Grafted Skullcap, Ensnaring Bridge, and Meekstone to throw a barrage of expendable Squirrel troops at an opponent while keeping you safe from harm