Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.
When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can't be blocked as long as defending player controls an Island.)
Near Mint - $1.25
Lightly Played - $1.25
Moderately Played - $1.00
Heavily Played - $0.75
Damaged - $0.75
Near Mint Non-English - $1.25
Lightly Played Non-English - $1.25
Moderately Played Non-English - $1.00
Heavily Played Non-English - $0.75
Damaged Non-English - $0.75