Finally you can use five Merfolk to put a +1/+1 counter on each Merfolk you control, or basically insurance you can break any battlefield stall
At this point I took the deck into an MTGO league to get some clearer feedback on if this deck was actually good
Jace Beleren is something Im not currently running but could find a home
It already has the ability itself, so it can come down and start doing work immediately, and then it hands a big pile of keywords, including haste, to your other spiders at the beginning of combat on your turn
There are a number of possibilities here, ranging from value creatures such as Beast Whisperer to finishers such as Craterhoof Behemoth
(Damage and effects that say "destroy" don't destroy it.) Enchantment Protection (CTRL to add secondary) Ramp Herald's Horn As this artifact enters, choose a creature type