Void Portal
Now you're thinking with Void Portals.

Arcane: Dark
Base Rarity: Ultra-Rare
Troop Type: Mystic, Construct
Troop Role: Warmaster
Troop Id: K02_08 / 6289
Max skills: 0    31    42    14
Kingdom: Karakoth
Kingdom Id: 3017
Trait #1: Mystic Bond
Allied Mystics gain 2 Life.
Trait #2: Inscribed
Gain 1 Armor when an enemy casts a spell.
Trait #3: Impervious
Immune to all Status Effects, Devour, and Mana Burn.
Spell: The Summoning
Description: All Daemon Allies gain 2 Magic. If my Souls are 12 or more, summon a random Daemon.
Mana Color: Red, Purple
Mana Cost: 12
Spell Id: 7435