Slow prevents monsters from blinking, retaliating fireballs, and lets the player strike first (or disables the monsters first strike).
Note that the glyph is effected by magic resistance, with the chance of failure rising with resistance. If casting fails mana is still lost, but there are no effects.
Unlocking the Glyph
The Weytwut Glyph starts unlocked.
This glyph is awarded for worshipping Jehora Jeheyu. You are not awarded it for converting to Jehora Jeheyu from another god.
Weytwut is a utility glyph for positioning the player and monsters, gaining an effective first strike against a monster and negating status effects such as first strike and fireball retailiation. It is one of the most versatile spells in the game despite it's high mana cost
It's most obvious use is to remove enemies from player's path if they are blocking it. It is also extremely useful if ever the player is blocked in by moving dungeon walls or monsters, or if the player would like to position a monster in order to destroy walls or do damage from knockback.
Since a slowed enemy will always strike after the player, it can also be used to emulate GETINDARE or natural first strike and give you an edge when fighting stronger monsters.
Keep in mind, however, that monsters with first strike that are slowed simply have their first strike negated and strike order set to nromal - so a higher or same-level monster will still attack you first unless you have first strike too. This can be a particular useful trick for classes that rely on first strike and placing a final attack without taking damage, such as the Rogue or Warlord.
Another trick during the early stages is to teleport weaker monsters (popcorn) into corners, afflicting them with slow. Since slow also grants +1 Bonus XP on kill, the player can "fatten" his popcorn up, making them more valuable for later use.
Due to its mana high cost, Weytwut doesn't have any particular syngergy with other glyphs, and loses most of its usefulness in the later stages of a run.