Manacles of DecayHow it works & interactions with other cards

What It Does

Manacles of Decay attaches to a creature and immediately prevents it from attacking. Unlike standard enchantments that only offer static effects, this Aura features two activated abilities. The first allows you to pay black mana to shrink the creature's power and toughness, while the second uses red mana to ensure the creature cannot block for the remainder of the turn.

Resolving the Abilities

When you cast Manacles of Decay, you choose a creature to enchant. Once it is on the battlefield, the 'can't attack' restriction is continuous. You can activate the -1/-1 ability multiple times as long as you have the black mana to pay for it. The 'can't block' ability should be activated during your precombat main phase or the beginning of combat step to be effective, as it prevents the creature from being declared as a blocker later in the turn.

Common Mistakes

A common error is forgetting that the activated abilities are controlled by the player who controls the Aura, not the owner of the creature. Even if you enchant an opponent's creature, you are the one who spends the mana to activate the effects. Additionally, remember that reducing a creature's toughness to zero with the black mana ability will cause it to be put into the graveyard as a state-based action.

Strategic Implementation

This card is best used in Mardu (Red-White-Black) decks where you can access all its features. It is particularly effective against creatures with high power but low toughness, or utility creatures that you want to keep off the battlefield entirely by spending excess mana to reduce their toughness to zero.

Interaction examples

Securing the Draw

Phyrexian Arena

If your opponent has a creature that could destroy your Phyrexian Arena, you can play Manacles of Decay on it to stop it from attacking. Since the Arena draws you extra cards and costs you life, you can use those extra resources to find the black mana needed to activate the Aura's -1/-1 ability and eventually kill the creature.

Breaking the Standoff

Black Market Connections

With Black Market Connections, you can create a 3/2 Shapeshifter token. If your opponent has a 3/3 blocker, you can cast Manacles of Decay on their creature. Then, pay one red mana to activate the ability that prevents it from blocking. This allows your Shapeshifter to attack safely while the opponent's creature is stuck on the sidelines.