2Avenger of Zendikar enters the battlefield, triggering its ability.
3Holding priority, cast Mystic Reflection by paying , causing the next creatures or planeswalkers to enter the battlefield this turn to enter as copies of Avenger of Zendikar.
4Resolve the Avenger of Zendikar trigger, creating a token copy of Avenger of Zendikar for each land you control.
5Each Avenger of Zendikar enters the battlefield, triggering their abilities.
6Resolve an Avenger of Zendikar trigger, creating a 0/1 Plant creature token for each land you control.
7Repeat step 6 for each remaining trigger.
8Activate Goblin Bombardment any number of times by sacrificing any number of creature tokens, dealing that much damage to any target(s).