Mega-Tin 2020 - Tin of Lost Memories

Discard 1 Level 5 or higher Danger! monster; add 1 Level 4 or lower Danger! monster from your Deck to your hand. You cannot Special Summon monsters for the rest of this turn after this card resolves, except Danger! monsters. You can only activate 1 Danger! Excitement! Mystery! per turn.

Equip only to a Danger! monster. It gains 800 ATK/DEF. It cannot be destroyed by card effects. It can make up to 2 attacks on monsters during each Battle Phase.

Reveal 3 Danger! monsters with different names from your Deck, your opponent randomly picks 1 for you to Special Summon, and you shuffle the rest into the Deck. During the End Phase, destroy that Special Summoned monster. You can only activate 1 You're in Danger! per turn.

Valkyrie monsters you control gain 200 ATK for each of your opponent's banished monsters. If you control a Valkyrie monster other than Valkyrie Funfte: You can send 1 Spell/Trap from your Deck to the GY. You can only use this effect of Valkyrie Funfte once per turn.

You can only control 1 Valkyrie Erda. While you control this card, Special Summoned by the effect of a Valkyrie card, all face-up monsters your opponent controls lose 1000 ATK. Any card destroyed by battle or card effect that would be sent to your opponent's GY is banished instead.

Once per turn, you can either: Target 1 Fairy monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If the equipped monster would be destroyed by battle or card effect, destroy this card instead. When the equipped monster declares an attack: You can have it gain 500 ATK. (This ATK gain remains even if this card leaves the field.)

If all monsters you control are Valkyrie monsters: Target 1 Attack Position Valkyrie monster you control and 1 face-up monster your opponent controls; change your monster to Defense Position, and if you do, banish that opponent's monster. You cannot Special Summon monsters the turn you activate this card, except Valkyrie monsters. You can only activate 1 Valkyrie's Embrace per turn.

If you have a Union monster in your GY: Target any number of Valkyrie monsters you control; those monsters can attack directly this turn, but if they do so using this effect, their battle damage inflicted to your opponent is halved.

While you control a Valkyrie monster, monsters your opponent controls with 2000 or less ATK cannot attack. If this card in your possession is destroyed by an opponent's card effect: You can Special Summon 1 Level 5 or higher Valkyrie monster from your hand or Deck.

2+ Level 10 monsters
If a monster is destroyed by battle and sent to the GY: You can detach 1 material from this card, then target that monster; Special Summon it to your field in Defense Position. You can target 1 face-up Special Summoned monster you control, except this card; gain LP equal to that monster's original ATK. You can only use each effect of Number XX: Utopic Dark Infinity once per turn.

2 Fish, Sea Serpent, and/or Aqua monsters
Monsters this card points to gain 500 ATK/DEF. You can only use each of the following effects of Mermail Abyssalacia once per turn.
* During your opponent's turn (Quick Effect): You can send 1 card from your hand to the GY; add 1 Mermail monster from your Deck to your hand.
* If this card in its owner's possession is destroyed by an opponent's card: You can send 1 WATER monster from your Deck to the GY, then target 1 WATER monster in your GY; Special Summon it in Defense Position.

2 Level 3 monsters
Monsters this card points to cannot be destroyed by card effects. If this card on the field would be destroyed by battle or an opponent's card effect, you can send 1 other card you control to the GY instead. You can send 1 Level 3 monster from your Deck to the GY, then target 1 Burning Abyss monster on the field; it gains ATK/DEF equal to the sent monster's ATK/DEF, until the end of this turn. You can only use this effect of Cherubini, Ebon Angel of the Burning Abyss once per turn.