# 2020 Magic: The Gathering Magic Online Promos #79909

> Thassa's Oracle is a rare Merfolk Wizard creature from the 2020 Magic Online Promos set, known for its powerful win condition mechanic.

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## Identity

- **Year**: 2020
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Magic Online Promos
- **Card number**: #79909
- **Product type**: TCG_CARD

## Description

Thassa's Oracle is a legendary card in the Magic: The Gathering trading card game, specifically identified by card number 79909 in the 2020 Magic Online Promos set. This rare creature features the Merfolk Wizard type and carries a mana cost of two blue mana, making it an efficient addition to any blue-aligned deck. The card is celebrated for its unique ability to manipulate the top of a player's library based on their devotion to blue, offering strategic depth that appeals to competitive and casual players alike.

The card's primary effect triggers when it enters the battlefield, allowing the controller to look at the top X cards of their library, where X is determined by the number of blue mana symbols in the mana costs of permanents they control. The player may then place up to one of those cards on top of their library while shuffling the rest back into the library in a random order. If the value of X is greater than or equal to the total number of cards remaining in the library, the player wins the game immediately. This mechanic has made Thassa's Oracle a staple in various deck archetypes that focus on blue mana accumulation.

The 2020 printing by Jesper Ejsing offers a distinct visual interpretation of the Merfolk Wizard, adding to its appeal among fans of the artist and the character. For those building collections of rare Magic Online promotional cards, this product represents a key piece of the franchise's digital history. The card's enduring popularity in gameplay ensures it remains a relevant and sought-after component for TCG hobbyists looking to complete their sets or enhance their libraries with powerful creatures.

## FAQ

### What does Thassa's Oracle do in Magic: The Gathering?

Thassa's Oracle allows a player to look at the top X cards of their library, where X is their devotion to blue. They can put one card on top and shuffle the rest back in; if X is at least the number of cards in the library, they win the game.

### What is the mana cost of Thassa's Oracle?

The card has a mana cost of two blue mana symbols, giving it a mana value of two. This makes it a relatively low-cost creature to cast in the early to mid-game.

### What rarity is Thassa's Oracle in the Magic Online Promos set?

Thassa's Oracle is classified as a Rare card within the 2020 Magic Online Promos set. It is identified by the card number 79909 and features artwork by Jesper Ejsing.

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Last verified: 2025-11-29.