Complex sentence: The crystals recharge Conner's (Superboy) life force; thus bringing on his resurrection 1000 years in the future as seen in Final Crisis "The Legion of 3 Worlds"-The penultimate chapter of "The Lightning Saga".
Split into simpler sentences: The crystals recharge Conner's (Superboy) life force; thus bringing on his resurrection 1000 years in the future. As scene in Final Crisis "The Legion of 3 worlds"-The penultimate chapter of "The Lightning Saga".