The Great Henge — ruling 1

Once you announce that you're casting a spell, no player may take actions until the spell has been paid for. Notably, opponents can't try to change by how much The Great Henge's cost is reduced.

The Great Henge — ruling 3

The cost reduction ability reduces only the generic mana in The Great Henge's cost. The colored mana must still be paid.

The Great Henge — ruling 4

Once The Great Henge's last ability has triggered, you'll draw a card even if you can't put a +1/+1 counter on the creature for some reason (most likely because it has left the battlefield).

The Great Henge — ruling 5

Once you determine the cost to cast The Great Henge, you may activate mana abilities to pay that cost. If the greatest power among creatures you control changes while activating mana abilities, the cost to cast The Great Henge remains what you previously determined.

The Great Henge — ruling 6

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.

The Great Henge : règles, fonctionnement et interactions (MTG)

The Great Henge 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

This spell costs less to cast, where X is the greatest power among creatures you control. : Add . You gain 2 life. Whenever a nontoken creature you control enters, put a +1/+1 counter on it and draw a card.

Complete guide

The Great Henge is one of the most powerful artifacts in Magic history, serving as a massive source of mana, life, and card advantage. While its mana cost of nine seems daunting, its ability to scale down in price based on your creatures makes it an efficient powerhouse in many decks. Understanding the timing of its cost reduction and its triggered abilities is key to maximizing its value.

Understanding the Cost Reduction

The Great Henge features a cost reduction ability that subtracts X from its total cost, where X is the greatest power among creatures you control. This reduction applies to the generic mana portion of the spell's cost. Even if you control a creature with 7 or more power, you must still pay the two Green mana. The cost is locked in once you begin the casting process; if you announce you are casting it, your opponents cannot respond by destroying your largest creature to increase the price.

Resolving the Entry Trigger

Whenever a nontoken creature enters the battlefield under your control, The Great Henge triggers. This ability has two parts: putting a +1/+1 counter on that creature and drawing a card. These two effects happen together during the resolution of the trigger. If the creature leaves the battlefield while the ability is still on the stack, you will not be able to place the counter, but you will still draw your card as the ability resolves.

Strategic Timing and Common Mistakes

A common mistake is forgetting that The Great Henge only triggers for nontoken creatures. If you create a token, you will not get a counter or a card. Additionally, remember that the cost reduction checks your creatures' power at the moment you cast it. If you have a creature that grows based on other factors, ensure its power is at its peak before you attempt to cast The Great Henge to save as much mana as possible.

Interaction examples

Reviving a Legend

Portal to Phyrexia

If you use Portal to Phyrexia to return a nontoken creature from a graveyard to the battlefield during your upkeep, The Great Henge will see that creature enter. You will put a +1/+1 counter on that creature and draw a card. Even though Portal to Phyrexia makes the creature a Phyrexian, it is still a nontoken creature entering your control.

Protecting the Henge

Darksteel Forge

With Darksteel Forge on the battlefield, The Great Henge gains indestructible. This means opponents cannot destroy your Henge with standard artifact removal spells. However, because Darksteel Forge is an artifact and not a creature, it does not contribute to the cost reduction of The Great Henge, nor does it trigger the +1/+1 counter or draw effect when it enters.

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

How it works : The Great Henge

Original English text — Wizards of the Coast / Scryfall

#1October 2, 2025· Wizards of the Coast
Once you announce that you're casting a spell, no player may take actions until the spell has been paid for. Notably, opponents can't try to change by how much The Great Henge's cost is reduced.
No other card is named in this ruling.
#2October 2, 2025· Wizards of the Coast
The first step of casting a spell is to move it to the stack. If this causes the greatest power among creatures you control to change, that new power will be used to determine the cost reduction.
No other card is named in this ruling.
#3October 2, 2025· Wizards of the Coast
The cost reduction ability reduces only the generic mana in The Great Henge's cost. The colored mana must still be paid.
No other card is named in this ruling.
#4October 2, 2025· Wizards of the Coast
Once The Great Henge's last ability has triggered, you'll draw a card even if you can't put a +1/+1 counter on the creature for some reason (most likely because it has left the battlefield).
No other card is named in this ruling.
#5October 2, 2025· Wizards of the Coast
Once you determine the cost to cast The Great Henge, you may activate mana abilities to pay that cost. If the greatest power among creatures you control changes while activating mana abilities, the cost to cast The Great Henge remains what you previously determined.
No other card is named in this ruling.
#6October 2, 2025· Wizards of the Coast
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
No other card is named in this ruling.