Time staff

Serapis’s hand, still clutching his staff, thrust through the bricks and boards. The monster’s three heads blasted shafts of steam in all directions. Annabeth’s knife remained hilt-deep in the monster’s shell, the scar round it venting red-hot hieroglyphs, Greek letters and English curse words - thousands of years of bad language spilling free.
Like a time line, Annabeth thought.
Suddenly an idea clicked in her mind. ‘Past, present and future. He controls them all. ’
‘What?’ Sadie asked.
‘The staff is the key,’ Annabeth said. ‘We have to destroy it.