A wall of spikes that damages and slows anything that touches it. Wallo is the Cactus school's crowd-control anchor, less about damage and more about forcing enemies to stop moving for a moment while you and your team deal with them.
Strategy
Place it across a corridor or between you and an approaching group to buy time and force enemies into a choke. The slow effect makes Wallo especially useful as a setup for slow, high-damage weapons like the Long Ranger or Leveredge. Placement precision matters more here than with other Cactus spells.
Strengths
Slows enemies on contact for consistent crowd control
Creates a physical barrier enemies must navigate around
Good setup for precision weapons that need a stationary target
Weaknesses
Requires deliberate placement to be effective
Enemies that can jump or teleport ignore the wall entirely