Archangel of Thune is also a welcome complement to the green-based shell with Courser of Kruphix and Scavenging Ooze
Whenever chaos ensues, create two 2/2 black Alien Angel artifact creature tokens with first strike, vigilance, and "Whenever an opponent casts a creature spell, this permanent isn't a creature until end of turn." As the triggered ability of the Alien Angel token resolves, it continues to be an artifact but will stop being both an Alien and an Angel until it becomes a creature again
X Speed (Item / Promo) This item just reduces retreat costs for a turn by 1
When the arch's power is fully used, the small guys can become unblockable for a turn, using the arch to sneak in and deal damage
It's important to keep in mind that colorless mana isnt affected by Hall of Gemstones, so spells that require it will be fine
The stack resolves last-in, first-outmeaning the most recent spell resolves first