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PISORF is the knockback glyph, and it will send the target monster flying back one square, dealing damage to it if that square is not empty.
Unlocking the glyph
The PISORF glyph begins unlocked
A free PISORF glyph is awarded when worshipping Binlor Ironshield. Converting to Binlor's religion will not grant you the glyph.
When using PISORF, positioning is critical. The target will always be pushed away from you in a straight line, if at all. PISORF specialists will want to keep an eye out for targets that can be PISORFed for damage several times in a row. You have two basic options for damage:
-You can push enemies into walls, which pleases Binlor and opens up the map, but this may be difficult to do repeatedly without careful positioning, and can run into problems with unwanted exploration. WEYTWUT can be a useful preparatory tool to place the boss at the end of a long wall.
-You can push enemies against each other, which can easily be spammed and damages a second monster, but deals slightly less damage per target than walls. In an ideal situation, you can kill both monsters without much/any exploration.
The damage dealt by PISORF is proportional to your base attack, which means that the Orc race is especially competent with it. It has a low mana cost, and proportionally gains a huge advantage from the Wizard spell cost discount. This makes Orc Wizards shockingly effective PISORF casters. For everyone else, it's a useful way to deal physical damage without having to suffer retaliation from monsters.
The PISORF glyph is the only glyph in the game that will bypass a monster's magic resistance, allowing you to use it against bosses such as the Iron Man who are otherwise impervious to magic, or to clear out annoying magic-immune plants. Because it deals physical-type damage, it can allow you to very easily obtain the Specialist badge.
Additionally, PISORF does not trigger Retaliate: Fireball or Blink, making it very useful against late-game monsters like Djinns and Shades.
The damage prediction takes into account the tile behind the target, even if you have not explored it. Hovering over a monster with PISORF can thus sometimes give useful information about that tile.
If the tile behind the target is impassable but not a breakable wall or a monster (e.g. it is a pool, an unbreakable wall, or off-map), then casting PISORF will simply waste mana - the target will neither take damage nor get pushed back.