(An ongoing scheme remains face up until it's abandoned.)
Untap all permanents you control during each opponent's untap step.
At the beginning of each end step, if three or more cards were put into your graveyard this turn from anywhere, abandon this scheme.

Whenever you crank this Contraption, target player gains life equal to the greatest power among creatures you control.

, Sacrifice an artifact with mana value X: Bosh, Iron Golem Avatar deals X damage to any target.

Slumbering Waterways enters the battlefield tapped.
: Add or .
Flying, vigilance, trample

{TK}{TK} — : Add . Spend this mana only to cast noncreature spells.
{TK}{TK}{TK} — Infect (This permanent deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
{TK}{TK} — 3/2
{TK}{TK}{TK}{TK} — 4/7

Choose one — Noxious Hydra Breath deals 5 damage to each player; or destroy each tapped non-Head creature.

When you set this scheme in motion, it deals 3 damage to up to one target creature. Create a 3/3 black Horror creature token.

Whenever a creature you control deals combat damage to a player, you may pay . If you do, create a 5/5 red Dragon creature token with flying.

Whenever you crank this Contraption, destroy target artifact.

Equipped creature has ": This creature deals 2 damage to any target."
Equip

果敢(あなたがクリーチャーでない呪文を唱えるたび、ターン終了時まで、このクリーチャーは+1/+1の修整を受ける。)
頂の修道士が戦場に出たとき、あなたの墓地にありインスタントやソーサリーであるカード1枚を対象とする。それをあなたの手札に戻す。

If a basic land you control is tapped for mana, it produces mana of a color of your choice instead of any other type.

, Sacrifice this artifact: This turn, when target creature you control attacks and isn't blocked, you may gain life equal to its power. If you do, it assigns no combat damage this turn.

Equipped creature gets +1/+2 and has deathtouch.
Equip

Each player may sacrifice a creature. Each player who sacrificed a creature this way chooses a Head and taps it. Each player who didn't sacrifice a creature loses 3 life.

Taiga Stadium enters tapped unless you control a white, blue, or black permanent.
: Add or .

: Destroy all nonland permanents. Activate only once and only during your turn.

Enchant creature
Enchanted creature gets +1/+1 and has trample.

: Add .
: Target creature loses all landwalk abilities until end of turn.

Tap an untapped creature you control, Discard a card: Target creature you control gets +X/+X until end of turn, where X is the number of cards in your hand.

Whenever a creature you control deals damage to a creature, destroy the other creature. It can't be regenerated.

Whenever you crank this Contraption, create two 1/1 colorless Gnome artifact creature tokens.

Whenever you crank this Contraption, until end of turn, target creature becomes an artifact in addition to its other types and gains ": You gain 3 life."

: Add .
, : Add .
, : Add or .

When you set this scheme in motion, gain control of target creature an opponent controls until end of turn. Untap that creature. It gets +3/+3 and gains trample and haste until end of turn.

At end of combat, for each creature you controlled at the time it dealt combat damage to a player this turn, copy a random card with the same mana cost as that creature. You may pay . If you do, choose one of those copies. If a copy of a permanent card is chosen, you may create a token that's a copy of that card. If a copy of an instant or sorcery card is chosen, you may cast the copy without paying its mana cost.

At the beginning of your upkeep, reveal the top card of your library. If it's a creature card with power 5 or greater, put it into your hand. Otherwise, you may put it on the bottom of your library.

{TK}{TK} — First strike
{TK}{TK}{TK}{TK} — Whenever this creature deals combat damage to a player, draw that many cards.
{TK}{TK} — 3/3
{TK}{TK}{TK} — 6/2

At the beginning of the game, choose a creature type. Creatures you control, creature spells you control, and creature cards you own in any zone other than the battlefield or the stack have the chosen type in addition to their other types.

Whenever you crank this Contraption, roll two six-sided dice. This Contraption assembles a number of Contraptions equal to the difference between those results. (To assemble a Contraption, put the top card of your Contraption deck face up onto one of your sprockets.)

Red legendary creatures you control have "bands with other legendary creatures." (Any legendary creatures can attack in a band as long as at least one has "bands with other legendary creatures." Bands are blocked as a group. If at least two legendary creatures you control, one of which has "bands with other legendary creatures," are blocking or being blocked by the same creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

{TK}{TK} — Sacrifice this permanent: Draw two cards.
{TK}{TK}{TK} — Whenever this creature attacks, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
{TK}{TK} — 4/1
{TK}{TK}{TK}{TK}{TK} — 8/7

Yawning Portal — You gain 1 life. (Leads to: Dungeon Level)
Dungeon Level — Scry 1. (Leads to: Goblin Bazaar, Twisted Caverns)
Goblin Bazaar — Create a Treasure token. (Leads to: Lost Level)
Twisted Caverns — Target creature can't attack until your next turn. (Leads to: Lost Level)
Lost Level — Scry 2. (Leads to: Runestone Caverns, Muiral's Graveyard)
Runestone Caverns — Exile the top two cards of your library. You may play them. (Leads to: Deep Mines)
Muiral's Graveyard — Create two 1/1 black Skeleton creature tokens. (Leads to: Deep Mines)
Deep Mines — Scry 3. (Leads to: Mad Wizard's Lair)
Mad Wizard's Lair — Draw three cards and reveal them. You may cast one of them without paying its mana cost.

Each creature you control must be blocked if able.
: Exile target creature that's blocking a creature you control.

Creatures without flying or islandwalk can't attack.
Whenever chaos ensues, until a player planeswalks, you can't lose the game and your opponents can't win the game.

Sacrifice a permanent: Return target creature to its owner's hand.