Convinces a creatures to help you. Convince Creature, Paralyze and Animate Dead are the only runes that need mana to be used.
The mana required to use this rune varies depending upon the creature that you want to convince.
There are some creatures that cannot be convinced and some creatures that can only be convinced (cannot be summoned). You also cannot convince monster summoned by someone else.
The spell to create the rune is called Convince Creature
No creatures drop convince creature runes.