Sink into Takenuma 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

Sweep — Return any number of Swamps you control to their owner's hand. Target player discards a card for each Swamp returned this way.

Complete guide

Sink into Takenuma is a unique Arcane sorcery from the Saviors of Kamigawa set that features the Sweep mechanic. It offers a powerful, scalable discard effect that rewards players who are willing to trade their board presence for card advantage. By returning Swamps to your hand, you can devastate an opponent's resources while setting up for future land drops.

What it Does

Sink into Takenuma allows you to return any number of Swamps you control to your hand as part of the spell's resolution. The primary effect is that a target player must discard one card for every Swamp you chose to return. Since it has the Arcane subtype, it can also be used to trigger 'whenever you cast a Spirit or Arcane spell' abilities or be spliced onto other Arcane spells.

How it Resolves Step by Step

First, you cast the spell and choose a target player. Upon resolution, you choose how many Swamps you currently control to return to your hand. You do not choose which Swamps or how many until the spell is actually resolving. Once the Swamps are returned, the target player discards that many cards. If the target player has fewer cards in hand than the number of Swamps you returned, they simply discard their entire hand.

Common Mistakes

A frequent error is assuming you must return all your Swamps; however, the text says 'any number,' meaning you can choose zero if you simply need to trigger an Arcane ability. Another mistake is forgetting that the lands must be Swamps. Non-basic lands with the Swamp subtype count, but a basic Forest will not. Lastly, remember that returning the lands is not a cost to cast the spell; it happens during resolution, so if the spell is countered, your lands stay on the battlefield.

When to Play It

This card is best played in the late game when you have an excess of mana and your opponent is holding key pieces. It is also highly effective in decks that benefit from having lands in hand, such as those with Retrace or Landfall mechanics. In a mono-black shell, it can act as a sudden 'hand-attack' that leaves an opponent with no options left to defend themselves.

Interaction examples

Basic Discard Setup

You have five Swamps on the battlefield and your opponent has three cards in hand. You cast Sink into Takenuma targeting your opponent. During resolution, you choose to return three Swamps to your hand. Your opponent is forced to discard all three cards in their hand.

Setting Up Future Plays

Victimize

You cast Sink into Takenuma and return two Swamps to your hand to force a discard. On your next turn, even though you have fewer lands on the battlefield, you can play one of the Swamps you returned to ensure you have the mana to cast Victimize, bringing back two threats from your graveyard.

Resource Management

Toxic Deluge

If you anticipate needing to cast a large Toxic Deluge next turn, be careful with your Sweep count. If you return all four of your Swamps to force a discard of four cards, you won't have the mana to cast Toxic Deluge on the following turn unless you have other mana sources available.

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