Blood Funnel 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

Noncreature spells you cast cost less to cast. Whenever you cast a noncreature spell, counter that spell unless you sacrifice a creature.

Complete guide

Blood Funnel is a high-risk, high-reward enchantment that offers a massive mana discount at a steep biological price. By turning your creatures into fuel for your magic, you can accelerate your game plan significantly ahead of the curve. However, failing to provide a sacrifice means your spells will vanish into the void.

A Cost Reduction with a Catch

Blood Funnel features two distinct abilities that work in tandem whenever you attempt to cast a noncreature spell. First, it applies a static cost reduction of {2} to the total cost of the spell. Second, it creates a triggered ability that goes on the stack immediately after you finish casting that spell, demanding the sacrifice of a creature to let the spell resolve.

The Step-by-Step Resolution

When you cast a noncreature spell, you first determine the total cost by taking the mana cost, adding increases, and then applying the {2} reduction from Blood Funnel. Once the spell is cast and mana is paid, Blood Funnel's second ability triggers. This trigger sits on top of your spell on the stack. As the trigger resolves, you choose whether to sacrifice a creature; if you don't or can't, the spell is countered and moved to the graveyard.

Common Pitfalls

It is important to remember that Blood Funnel's trigger is not optional—you must sacrifice a creature if you want your spell to resolve. If you have no creatures on the battlefield when the trigger resolves, your spell will be countered automatically. Additionally, because the reduction applies to the total cost, it can satisfy generic mana requirements but cannot reduce colored mana symbols.

Strategic Implementation

The best time to play Blood Funnel is in a deck that can consistently generate expendable tokens. By using small, recurring creatures to pay for the sacrifice trigger, you effectively turn every noncreature spell into a discounted powerhouse, allowing you to chain multiple enchantments or artifacts in a single turn.

Interaction examples

Accelerating your Card Draw

Phyrexian Arena

With Blood Funnel on the battlefield, you cast Phyrexian Arena. The cost is reduced by {2}, meaning you only pay {B}. Once cast, Blood Funnel triggers. You sacrifice a creature to the trigger, and then Phyrexian Arena resolves and enters the battlefield.

Creating Resources to Feed the Funnel

Black Market Connections

If you have Black Market Connections, you can choose the 'Hire a Mercenary' mode to create a 3/2 Shapeshifter token. In your main phase, you can then cast another noncreature spell for {2} less and use that specific token to satisfy Blood Funnel's sacrifice requirement.

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