When Bone Rattler is put into your graveyard from anywhere, exile it. When you do, create four Reassembling Skeleton token cards and put them into your graveyard.

When this Equipment enters, manifest dread, then attach this Equipment to that creature.
Equipped creature gets +2/+2 and has deathtouch and lifelink.
Equip—Sacrifice a creature.

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Any number of target enchanted creatures you control and up to one other target creature you control each deal damage equal to their power to target creature you don't control.

When this enchantment enters, create two 3/3 green Phyrexian Beast creature tokens with toxic 1. (Players dealt combat damage by them also get a poison counter.)
Corrupted — At the beginning of your upkeep, if an opponent has three or more poison counters, choose a creature you control, then draw cards equal to its total toxic value.

Haste
This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Enchant creature
When enchanted creature dies, its controller loses life equal to its power and you gain life equal to its toughness.

Flying
Whenever you sacrifice a creature, target opponent sacrifices a creature of their choice.

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Choose three. You may choose the same mode more than once.
• Fiery Confluence deals 1 damage to each creature.
• Fiery Confluence deals 2 damage to each opponent.
• Destroy target artifact.

When Mysterio enters, create a 3/3 blue Illusion Villain creature token for each nontoken Villain you control. Exile those tokens when Mysterio leaves the battlefield.

When Lazav enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
: Lazav becomes a copy of target creature card in your graveyard with mana value X, except its name is Lazav, the Multifarious, it's legendary in addition to its other types, and it has this ability.

Deathtouch, lifelink

Target creature gets +1/+1 until end of turn for each creature you control.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

When this creature enters or dies, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

When this creature enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
At the beginning of combat on your turn, investigate for each goaded creature you control. Then each creature you control is no longer goaded.

Whenever a permanent you control is turned face up, you gain 1 life for each creature you control.
: Manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Partner with Trynn, Champion of Freedom (When this creature enters, target player may put Trynn into their hand from their library, then shuffle.)
Menace
Sacrifice a Human: Put a +1/+1 counter on Silvar. It gains indestructible until end of turn.