# 2020 Magic: The Gathering Magic Online Promos #80977

> The 2020 Magic Online Promos foil release of Cavern Whisperer, a Nightmare creature featuring mutate mechanics and a powerful discard effect.

Canonical URL: https://supercatch.com/product/magic-the-gathering-magic-online-promos-cavern-whisperer-80977-foil

## Identity

- **Year**: 2020
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Magic Online Promos
- **Card number**: #80977
- **Product type**: TCG_CARD

## Description

The 2020 Magic Online Promos release of Cavern Whisperer offers a compelling entry for Magic: The Gathering enthusiasts. Identified as card number 80977 in the Magic Online Promos series, this foil edition features a Creature — Nightmare with a mana cost of {4}{B} and a power/toughness of 4/4. Designed by Steve Ellis, the card utilizes the mutate mechanic, allowing players to cast it for {3}{B} to attach it to a non-Human creature, combining abilities from both cards. This strategic depth is complemented by menace, requiring opponents to block with two or more creatures, and a triggered ability that forces each opponent to discard a card whenever Cavern Whisperer mutates. For collectors, the foil treatment adds a distinct visual appeal to this common rarity card. Owning this piece of Magic: The Gathering history allows fans to appreciate the innovative gameplay mechanics introduced in the Magic Online Promos subset. Whether you are building a themed collection or seeking unique foil variants, this card represents a notable artifact from the 2020 promotional landscape.

## FAQ

### What is the mutate mechanic in Magic: The Gathering?

Mutate is a keyword action that allows a player to cast a spell for an alternative cost to merge it with a target non-Human creature they own. The resulting permanent becomes the creature on top plus all abilities from the creatures underneath it.

### Who illustrated the Cavern Whisperer card?

The artwork for the 2020 Magic Online Promos Cavern Whisperer card was created by artist Steve Ellis, known for his contributions to the Magic: The Gathering universe.

### What are the stats and type of Cavern Whisperer?

Cavern Whisperer is a blue/black Nightmare creature with a mana value of 5. It has a power and toughness of 4/4 and possesses the keywords menace and mutate.

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Last verified: 2025-11-29.