10 Most Powerful Characters Killed By Hal Jordan's Green Lantern

Few beings have been able to be a perpetual thorn in the side of the DC universe as Krona. The rogue Oan and former Guardian of the Universe broke his people's cardinal law by looking back to the origin of the universe (an act that led to the formation of the Multiverse) and since his banishment, he has attempted time and time again to get his revenge on the Oans.

This came to a head in the Post-Crisis storyline, War of the Green Lanterns. Following the events of the Blackest Night saga, a weakened Krona traveled the cosmos to capture the seven emotional entities and realize his plans. His actions disrupt all Lantern Corps and this forces uneasy alliances between the Green Lanterns and more unstable groups such as the Yellow and Red Lanterns.

After much conflict and destruction, Hal and Sinestro teamed up to fight the former Guardian. This alliance proved successful as Jordan was able to unleash a massive blast, killing Krona despite the latter's amplified state.