Appeal to Eirdu — ruling 1

You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.

Appeal to Eirdu — ruling 2

If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.

Appeal to Eirdu — ruling 3

Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.

Appeal to Eirdu — ruling 4

When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.

Appeal to Eirdu : règles, fonctionnement et interactions (MTG)

Appeal to Eirdu 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

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.) One or two target creatures each get +2/+1 until end of turn.

Complete guide

Appeal to Eirdu is a versatile white instant that rewards you for having a wide board of creatures. By utilizing the Convoke mechanic, you can boost your forces even when your lands are fully exhausted.

How Convoke Works

Convoke allows you to tap creatures you control to pay for the spell's cost. Each creature taps for either one generic mana or one mana of any of its colors. Importantly, you can tap creatures even if they have 'summoning sickness,' as Convoke is not an activated ability with a tap symbol.

Resolution Step-by-Step

First, cast Appeal to Eirdu and choose one or two targets. Second, calculate the total cost, then tap any number of untapped creatures to reduce the mana you must spend. Once the spell resolves, each targeted creature gains +2/+1 until the end of the turn. If one target becomes illegal before resolution, the other still receives the buff.

Common Pitfalls

You cannot tap a creature for both a mana ability and Convoke simultaneously. For example, if you sacrifice a creature to generate mana, it is gone before you reach the payment step of casting. Additionally, tapping an attacking creature for Convoke does not remove it from combat; it continues to attack as normal.

When to Cast

Use this spell during the declare blockers step to save your creatures from unfavorable trades or to push for lethal damage. Because it is an instant, it serves as a powerful combat trick that can be cast for zero mana if you have four creatures available.

Interaction examples

Gifting a Target

Generous Gift

If your opponent targets your only creature with Generous Gift, you can respond by casting Appeal to Eirdu. Even if you have no mana, you can tap your creature to pay part of the Convoke cost. The creature gets +2/+1 before it is destroyed and replaced by an Elephant token.

Phasing Out of Reach

Teferi's Protection

If you cast Teferi's Protection, your creatures phase out and are treated as though they do not exist. You will no longer be able to tap them for Convoke to cast Appeal to Eirdu, and you cannot target them with the spell until they phase back in during your next untap step.

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

How it works : Appeal to Eirdu

Original English text — Wizards of the Coast / Scryfall

#1November 17, 2025· Wizards of the Coast
You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.
No other card is named in this ruling.
#2November 17, 2025· Wizards of the Coast
If a creature you control has a mana ability with in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.
No other card is named in this ruling.
#3November 17, 2025· Wizards of the Coast
Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
No other card is named in this ruling.
#4November 17, 2025· Wizards of the Coast
When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
No other card is named in this ruling.

Legal formats

standardfuturehistorictimelessgladiatorpioneermodernlegacypaupervintagepennycommanderoathbreakerstandardbrawlbrawlcompetitivebrawlalchemypaupercommanderduel

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Official source

Appeal to EirduHow it works & interactions with other cards