Feldon of the Third Path | Worldgorger Dragon | Mass Hysteria

(and one other card)

({4} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) available.

Cast
Heart-Piercer Manticore.
When it ETBs, its trigger goes onto the stack.
In response to the trigger, activate
Feldon's ability, making a token copy of
Worldgorger Dragon.
The token copy of
Worldgorger Dragon ETBs, exiling all permanents you control.
Resolve the
Heart-Piercer Manticore trigger, sacrificing the token copy of
Worldgorger Dragon and dealing 7 damage to any target.
The token
Worldgorger Dragon's LTB triggers, returning all permanents you control to the battlefield.
Repeat for infinite damage.