You can draft two spells from its spellbook, which are all warlock creatures that have some sort of at the beginning of your upkeep ability
In deck building, this balance is called the "mana curve." Each spell has a mana value, which is the total mana cost of a spell
Him being flying certainly helps, as well, although it's really more the first part of the equation that brings people here most often
Forcefield ($600) Forcefield is a card that can find some use to keep you alive, particularly against big creatures swinging at you
Make unexpected plays and draw additional cards to let the cogs of your strategy click into place
FromTheShire: A classic Simic counters and tokens card, this basically does exactly what you would expect