Leshrac's Sigil 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

Whenever an opponent casts a green spell, you may pay . If you do, look at that player's hand and choose a card from it. The player discards that card. : Return this enchantment to its owner's hand.

Complete guide

Leshrac's Sigil is a classic hate-enchantment designed to punish opponents who dare to cast green spells. It provides a repeatable way to strip resources from your opponent's hand while remaining difficult to remove thanks to its self-bounce ability. If you are looking to lock down a game by controlling hidden information, this sigil is your best tool.

Punishing Nature

The primary function of Leshrac's Sigil is its triggered ability. Whenever an opponent casts a green spell, the Sigil triggers and goes on the stack. You are then given the option to pay two black mana; if you do, you gain full access to their hand, choose any card, and force them to discard it. Because this trigger occurs when the spell is cast, the discard happens before their green spell even resolves.

The Step-by-Step Resolution

First, an opponent must cast a spell that is green. Once the spell is on the stack, Leshrac's Sigil triggers. When the trigger resolves, you decide whether to pay the mana cost. If you pay, you immediately look at the opponent's hand. You then choose one card—regardless of its type—and the player must put that card into their graveyard. Finally, the opponent's original green spell continues toward resolution.

Evasion and Recurrence

One of the most powerful aspects of this enchantment is its activated ability. By paying two black mana, you can return Leshrac's Sigil to your hand. This allows you to protect it from disenchant effects or targeted removal. Furthermore, if you have extra mana, you can play it during your turn and keep mana open to bounce it back if your opponent tries to destroy it on their turn.

Strategic Implementation

Common mistakes involve forgetting that the trigger is optional. You only pay the mana if you want the discard effect. Additionally, remember that looking at the hand and choosing the card are part of the same resolution; your opponent cannot respond between you looking at their hand and you choosing which card they lose.

Interaction examples

Basic Trigger Execution

An opponent casts a green creature spell. With Leshrac's Sigil on the battlefield, you pay two black mana as the trigger resolves. You look at their hand, see a powerful land and a high-cost spell, and choose the spell to be discarded before their creature even enters the battlefield.

Maintaining Card Advantage

Phyrexian Arena

While Phyrexian Arena provides you with extra cards every turn at the cost of life, Leshrac's Sigil ensures that your opponent's card quality diminishes every time they play green. This creates a widening gap in resources where you are drawing two cards to their zero usable cards.

Fueling the Cost

Black Market Connections

Black Market Connections can create Treasure tokens during your main phase. You can save these Treasures to pay for Leshrac's Sigil's triggered ability on an opponent's turn, ensuring you have the black mana required to strip their hand even if you tapped out for other spells.

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