Tags: race-condition 

Rating: 0

tl;dr:
1. Notice that blessing an item removes this item and spawns new one
2. Notice this operation stalls for 1s, when we can take other actions
3. Bless the same item twice within 1s, to duplicate it.

Full writeup: https://github.com/p4-team/ctf/tree/master/2019-11-14-dragon-finals/raiding_party