Thorn

Description
Shield decays by 1 every 0.5 seconds.

Strategy and Synergy
This artifact is, in some way, comparable to the. Both of them will boost the spell power in exchange for defensive stats. Thorns, however, will slowly drain away your shields over time rather than directly reducing your stat.

The shield-drain can be worked out by having some spells, when playing as Reva or when you're highly skilled in dodging, such as when experienced with Invader Selicy. When compared to the former Double Edge, Thorns is a better choice as it is easier to manage your shield than your defense stat.

The increase in Spell power will greatly boost the and fast-casting spells with low damage such as the, which can be spammed and each SP point will increase the overall DPS potential.

Trivia
The item name and flavor text are a reference to the Korean Manhwa Tower of God.