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Expanding Codex: Bookkeeper

Alternate Traits and Actions The following changes allow GMs to alter a bookkeeper without modifying its challenge rating. Creator’s Mark. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: the bookkeeper marks the target with an invisible rune, which it and its creator can see. The mark can be removed with a dispel magic or similar magic. The bookkeeper loses its Bite action. Dual Binding. The bookkeeper is attuned to two books...

Expanding Codex: Void Giant

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter a void giant without modifying its challenge rating. Deep Void Casting (Recharge 4–6). As a bonus action, the void giant can infuse a spell with powerful void magic. One creature that...

Expanding Codex: Swolbold

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter a swolbold without modifying its challenge rating: Audience-Driven Overconfidence. The swolbold has advantage on attack rolls against a creature if at least one of the swolbold’s...

Expanding Codex: Venom Elemental

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter a venom elemental without modifying its challenge rating: Air Form. Aerosolized versions of the venom elemental are rarer than their liquid cousins on the demiplane of poisons. The...

Expanding Codex: Albino Death Weasel

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter an albino death weasel without modifying its challenge rating: Albino Camouflage. The albino death weasel is naturally camouflaged in areas with white backgrounds, such as...

Expanding Codex: Arcanaphage

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter an arcanaphage without modifying its challenge rating. Diviniphage. A diviniphage feeds solely on divine magic but still interacts with all types of magic. It is immune to damage from...

Expanding Codex: Ziphius

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter a ziphius without modifying its challenge rating: Capsize. If the ziphius moves at least 20 feet straight toward a seagoing vessel and then hits and damages it with a dorsal fin...

Expanding Codex: Leonino

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter a leonino without modifying its challenge rating: Favored Messenger. While the leonino is delivering a message, it has advantage on saving throws against spells and other magical...

Expanding Codex: Moon Drake

The Expanding Codex series fleshes out monsters from the Creature Codex, giving GMs ways to modify the existing monsters to surprise well-prepared players or to introduce monsters to a campaign. Alternate Traits and Actions The following changes allow GMs to alter moon drakes without modifying its challenge rating: Shiftersense. The moon drake can sense the presence of shapeshifters within 30 feet. The moon drake’s darkvision is reduced to 60...


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