Now that those caveats are out of the way, lets get right into all the numbers
Build a board of Merfolk, trigger mass explore at the start of each combat to filter your library and grow your creatures, then attack with Hakbal to accelerate your land drops or draw cards
Unsanctioned is a crazy silver-bordered Magic: The Gathering experience, playable right out of the box
Blink the summons right before they go away, and you have a nice engine going on, besides all the crazy stuff that you can do with Agent of Treachery or Atraxa, Praetors' Voice
Youre a lot less likely to use this Shelob in the 99 anywhere, though
You technically can put multiple regeneration effects on a permanent at once, but the multiple effects serve no real purpose and will all go away the next time the permanent would be destroyed that turn