As we get closer to kicking off a 13th Age campaign we are all thinking up character ideas and concepts. One of the races in Fire Haven are the 'tentacle dwarves' who have been deformed by the taint that still plagues the New Dawn World. So one concept under development is to take one of those refugee dwarves and craft a slightly bitter yet proud adventurer (cleric or fighter). I will look at whether their shield or mace/warhammer might actually be a mutated arm as well.
Here is a SBPro sketch of how a single large tentacle might work.