AtGL

AtGL represented Atomic Green Lantern from Infinite Crisis. While Hal Jordan searched the ruins for survivors, his power ring failed and the construct supporting heavy rubble collapsed on him. He awoke with his right arm amputated and the dead ring embedded in his chest.

A radioactive isotope restored the ring at the cost of a shorter, more painful life, and Hal used its power to form a construct arm in place of the one he lost. Contemporary players shortened Atomic Green Lantern to `AtGL`, matching the Twitch command.

When this emote was active, viewers typed AtGL in Twitch chat to use it. The command specifically referred to the Infinite Crisis Hal Jordan with the chest-embedded ring and energy-construct arm.