How to Play Union Arena

1. Deck construction

From Bandai's official tournament regulations:

• Exactly 50 cards in the deck.
• One title only. Every card must share the same source material code: the three letters after the slash in the card number. For UE24BT/REZ-1-001 that's REZ (Re:Zero).
• Up to 4 copies of the same card number after the slash. UE22BT/CSM-1-049 and the promo UEPR/CSM-1-049 count as the same card.
• At most 4 cards each with the Special, Color and Final triggers. The limit is per trigger type, so a deck can have 4 of each.
• 3 Action Point (AP) cards are prepared separately and don't count toward the 50.
• The deck must also follow the current ban and restriction list.

The deck builder on this site enforces all of these as you add cards.

2. Reading a card

Card number

Set code, then title code and number, e.g. UEX08BT/BLC-4-001. The title code (BLC = Bleach) decides which deck a card can go in.

Energy

The energy, and its color, a card needs before it can be played. Cards come in five colors: red, blue, green, yellow and purple.

AP cost

How many Action Points it costs to play the card.

BP

Battle Points, a character's strength in battle.

Generates

The energy a character produces, shown as color letters (Y = 1 yellow, YY = 2 yellow).

Affinity

Group names from the series (e.g. Stern Ritters, Black Bulls) that other cards refer to.

Card types

Character, Event and Site go in the deck. Action Point cards stay outside it.

3. Triggers

Many cards carry a trigger effect, marked in brackets at the start of the trigger text. There are seven trigger types. The examples below are the most common wording for each type on real cards.

[Get]

Add this card to your hand.

[Draw]

Draw a card.

[Active]

Choose one character on your field and switch it to active. It gains 3000 BP until the end of the turn.

[Raid]

Add this card to your hand, or if you have the required energy, perform Raid with it.

[Special] max 4

Choose one character on your opponent's front line and sideline it.

[Color] max 4

Play one purple character card with 2 or less required energy and 1 AP cost from your sideline set to active onto your front line.

[Final] max 4

If you have 0 life, place the top card of your deck into your life area.

4. Keywords on cards

Card text uses bracketed keywords. These come up most often, and every one is filterable on the database:

• [When Played], [When Attacking], [When Blocking], [When Sidelined]: when the effect activates.
• [Once Per Turn], [During Your Turn]: limits on when or how often it applies.
• [Impact 1]: when this character attacks and wins a battle, deal 1 damage to your opponent (card reminder text).
• [Step]: during your movement phase, you may move this card from your front line to your energy line (card reminder text).
• [Raid], [Snipe], [Double Attack], [Double Block], [Nullify Impact]: see the official rules for their exact definitions.