Additional ETB triggers (10)
This is a list I've really enjoyed recently. It's not trying to be optimized or anywhere near competitive, but rather splashy and explosive while embracing the claim that, "actually, variance is kind of fun".
I'm not looking to cheat out Ugin and Eldrazi, despite that temptation being clearly advertised on The Prismatic Bridge. Instead, my endgame is to pop off with a handful of token lords and blink loops. Doing so at instant speed lets me make a big ol pile of dudes before untapping, then blink End-Raze Forerunners a few times before attacking, or just jam a bunch of mana into Mirror Entity, or Mirrorweave a lord with an anthem effect such as Captain of the Watch. You get the idea.