Scute Swarm and Baloths combo with Kodama of the East TreeKodama of the East Tree and Simic Growth ChamberSimic Growth Chamber, Arid ArchwayArid Archway, or Guildless CommonsGuildless Commons
But paying 5 to get double ETBs on everything is wacky
If I can set myself up right, I should be able to do an awful lot of cycling
It also doubles triggered abilities of creatures within this power range, whether thats an ETB, an attack trigger, or something else
Throwing this on some early creature and charging forward always yields good results, especially with the extra lands
Its 5 mana and requires you to get in with attacks, but once you start getting the big swings in, youll be cheating mana costs on your opponents most powerful artifacts and creatures