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 - $2.20
Lightly Played - $2.00
Played - $1.60
Heavily Played - $1.30
Damaged - $1.10
Near Mint Non-English - $2.20
Lightly Played Non-English - $2.00
Played Non-English - $1.60
Heavily Played Non-English - $1.30
Damaged Non-English - $1.10