Sleeper Island Summoning Guide

Change 1: Minion Limit

Characters are limited to 4 minions or 4+1 if you have a familiar and/or animal companion.

Change 2: Upcasting

Upcasting spells no longer increases the number of creatures summoned.
Instead the CR maximum for the respective summons are increased by 1 per duplicate set.

Example: If it would normally double then CR+1, if it would normally triple then CR+2, if it would normally quadruple then CR+3.

CRs are rounded down to nearest whole number if the resulting CR is over 1. Single summoned creatures instead increase their CR by 1 per spell level upcasted, this is in addition to any behavior that currently exists with increasing CR when upcasting.

Change 3: Encountering creatures

Change 4: Non-concentration Swarm Tokens 

Each swarm token can only have one creature type attached to it (e.g. zombie or skeleton but not both).
Each swarm token takes a single minion slot.

They are named “Swarm of {creature type} {number of creatures in swarm}”

Any aoe damage is multiplied by the number of creatures in the swarm.
The swarm’s number should be updated AFTER combat.

You are responsible for keeping track of this and if found to not be obeying the rules will have your summoning privileges revoked and possibly be kicked from the campaign.

They either do:

• 1 attack roll, full damage (add total damage of all mobs together)
• No attack roll, compare to-hit with AC (total damage = average/mob # of mobs hit %)
  Hit % = number of average hits for the mobs.

Change 5: Maximum HP

Change 6: Casting Time

All summoned spells require either their current casting time or a full minute casting time, whichever is longer.

To compensate, the spells durations are doubled, if the caster desires

Summoning Spells Table

Summoning Items Table