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How does the summoning ability affect the encounter difficulty in D&D5e?

The Drow Mage  (CR7CR 7) has the Action Summon Demon  (1/Dayday), which allows him to summon a shadow demon  (CR4CR 4), is. Is the Shadowshadow demon already included in the CR of the Drow Mage, or do iI have to count the Shadowshadow demon as an extra creature to determine the difficulty of the encounter?

How does the summoning ability affect the encounter difficulty in D&D5e

The Drow Mage(CR7) has the Action Summon Demon(1/Day), which allows him to summon a shadow demon(CR4), is the Shadow demon already included in the CR of the Drow Mage, or do i have to count the Shadow demon as an extra creature to determine the difficulty of the encounter?

How does the summoning ability affect the encounter difficulty?

The Drow Mage  (CR 7) has the Action Summon Demon  (1/day), which allows him to summon a shadow demon  (CR 4). Is the shadow demon already included in the CR of the Drow Mage, or do I have to count the shadow demon as an extra creature to determine the difficulty of the encounter?

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source | link

How does the summoning ability affect the encounter difficulty in D&D5e

The Drow Mage(CR7) has the Action Summon Demon(1/Day), which allows him to summon a shadow demon(CR4), is the Shadow demon already included in the CR of the Drow Mage, or do i have to count the Shadow demon as an extra creature to determine the difficulty of the encounter?