Artifact spells cost less to cast.

Whenever chaos ensues, creatures you control that are white, blue, and/or black become artifacts in addition to their other types until end of turn. Then each artifact creature you control gains vigilance, menace, and lifelink until end of turn.

: Add .
, , Sacrifice this land: Search your library for a basic Plains, Island, or Swamp card, put it onto the battlefield tapped, then shuffle.

, : Put an elixir counter on this artifact.
, Remove all elixir counters from this artifact: You gain 2 life for each elixir counter removed this way.

Metalcraft — This creature has protection from each color as long as you control three or more artifacts.

This land enters tapped unless a player has 13 or less life.
: Add or .

This creature enters with five -1/-1 counters on it.
, Remove five -1/-1 counters from this creature: Target player draws three cards.

Sunburst
, Remove four +1/+1 counters from this creature: Target player draws three cards.

Names — Eternal / Acrobat / Toast
Art — Alien plushie / Bowler hat / Weatherlight
2 — Whenever this creature deals combat damage to a player, exile target creature you control, then return it to the battlefield under its owner's control.
3 — : Untap another target permanent.
3 — 4/4
5 — 7/8

You may cast this card from exile.
When this creature becomes the target of a spell or ability an opponent controls, exile this creature.

This artifact enters with X charge counters on it, where X is your life total.
Landfall — Whenever a land you control enters, you may have your life total become the number of charge counters on this artifact.

, Sacrifice this artifact: Add one mana of any color.

Medium monstrosity, Challenge 2
Armor Class 13, Hit Points 44
Speed 30 ft., climb 30 ft.
Attacks Web Sense, Bite, Claws, Web
STR 14 (+2) DEX 15 (+2) CON 13 (+1)
INT 7 (-2) WIS 12 (+1) CHA 8 (-1)

Large Giant, Challenge 4
Armor class 12, Hit Points 85
Speed 40 ft.
Attacks Two Heads, Battleaxe, Morningstar
STR 21 (+5) DEX 8 (-1) CON 17 (+3)
INT 6 (-2) WIS 10 (+0) CHA 8 (-1)

, Pay 1 life: Add . Put a hatchling counter on this land.
When this land is put into a graveyard from the battlefield, for each hatchling counter on it, create a 1/1 black Insect creature token with flying.

This land enters tapped.
: Add .
Station (Tap another creature you control: Put charge counters equal to its power on this Planet. Station only as a sorcery.)
12+: , : Add for each creature you control.

Copy the next event the bosses play. (Put this card beside the event deck. After the next event is played, put this card into the event discard pile.)

Bebop's Rampage deals 2 damage to each creature the heroes control.

Each hero sacrifices a tapped creature they control.

The heroes lose 3 life and the bosses gain 3 life.

As a team, the heroes discard a total of two cards.

As a team, the heroes choose a creature with the greatest power among creatures they control. Destroy it. The bosses lose life equal to that creature's power.

Each hero taps a creature they control and puts X stun counters on it, where X is the number of bosses.