Summon Points is a stat from Final Fantasy XIII. It acts as the HP for Eidolons when they are fighting in battle alongside their summoner. It continuously drains and the drain speed always allows for the Eidolon to battle for 50 seconds. An Eidolon's summon time can be reduced with each hit they receive. The Shiva Sisters' SP is always equal, drains at the same speed, and regardless which receives damage, the SP for both is reduced.
Evocation is the act of calling upon or summoning a spirit, demon, god or other supernatural agent, in the Western mystery tradition. Comparable practices exist in many religions and magical traditions and may employ the use of mind-altering substances with and without uttered word formulas.