Rhet-Tomb Mystic is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flying Each creature card in your hand has cycling . (, Discard that card: Draw a card.)

Complete guide

Rhet-Tomb Mystic is a versatile Zombie Bird Wizard that grants your creature cards a new lease on life through the cycling mechanic. By turning every creature in your hand into a potential new draw, it ensures your deck remains fluid even when you cannot cast your threats.

Granting Cycling Abilities

While Rhet-Tomb Mystic is on the battlefield, its static ability applies to every creature card in your hand. Each of these cards gains 'Cycling {1}{U}'. This means you can pay two mana, one of which must be blue, and discard the creature card to draw a new card from your library.

How Cycling Resolves

To use the ability granted by Rhet-Tomb Mystic, follow these steps: First, verify the creature card is in your hand and you have {1}{U} available. Second, activate the ability by paying {1}{U} and discarding the creature card as a cost. This ability goes on the stack and can be responded to. Finally, if the ability resolves, you draw one card.

Common Mistakes

A common misconception is that the cycling cost is reduced by effects that reduce casting costs. Since cycling is an activated ability and not a spell, effects that reduce the cost of creature spells do not apply to the {1}{U} cycling cost. Additionally, once Rhet-Tomb Mystic leaves the battlefield, the creature cards in your hand immediately lose the cycling ability.

Strategic Timing

Because cycling is an activated ability, you can use it at any time you have priority, including on an opponent's turn. This allows you to dig for answers or reactive spells if a creature card in your hand isn't useful for the current board state.

Interaction examples

Cycling for Mana Fixing

Ornithopter of Paradise

If you have Rhet-Tomb Mystic on the battlefield but lack the correct colors to cast Ornithopter of Paradise, you can pay {1}{U} to discard Ornithopter of Paradise and draw a card, potentially finding the land or mana source you need.

Interactions with Cost Reducers

Foundry Inspector

With both creatures on the battlefield, the Foundry Inspector reduces the cost to cast artifact spells. However, if you choose to cycle an artifact creature card from your hand using the ability granted by Rhet-Tomb Mystic, the cost remains {1}{U}. Foundry Inspector does not reduce cycling costs because cycling is an activated ability, not a spell being cast.

Guide written with AI from the official text and rulings. Official English text prevails.