The first upgrade to the Spike Trap category, it has an upgrade cost of 1500 gold.
Going from the Spike Trap (Rank C) to The Poison Rod (Rank B) has the following effects :
- Increases the MP cost from 100 MP to 150 MP
- Success % increases from 7% to 8%
- Power increases from 15 to 25
- Duration increases from 2 seconds to 3 seconds