mtg.wtf

Flying
Artifact spells you cast have demonstrate. (When you cast one, you may copy it. If you do, choose an opponent to also copy it. Copies become tokens.)

Echo {3}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When The Keeper of Four Scythes enters, create four Scythe tokens. (They're Equipment with "Equipped creature gets +1/+1" and equip {2}.)
Equipped creatures you control get +1/+1.

While it's October 25th, 2024, whenever you cast your commander, create a token that's a copy of it except it isn't legendary.
While it's October 26th or 27th, 2024, if one or more tokens would be created under your control, instead twice that many tokens are created and each of them enters with a +1/+1 counter on it.
On any other date, both abilities apply. (Because why not?)

Choose a word that's four letters or longer. For each nonland permanent you control and each nonland card in your graveyard with the chosen word in its rules text or type line, create a colorless 2/2 creature token with no name or creature types.

Lifelink, vigilance, first strike
At the beginning of your combat step and whenever another Knight enters the battlefield under your control, put a day counter on The Knight of Weeks.
The Knight of Weeks gets +7/+7 for every seven day counters on it.

When The Highland Runner enters and at the beginning of the first upkeep in a game where it's your commander, you may have each player's life total become 20. If you do, each of your commanders stop being commanders this game. Shuffle them into your library. (They no longer go to the command zone.)
Ready to run (You can have two commanders if both have ready to run.)

Each player gains X life, draws X cards, returns X creatures from their graveyard to the battlefield, then returns X lands from their graveyard to the battlefield.

Choose one —
• Destroy all nonland permanent cards originally printed in the Mirrodin, Darksteel, Fifth Dawn, and Scars of Mirrodin expansions.
• Destroy all nonland permanent cards originally printed in the Mirrodin Besieged, New Phyrexia, and Phyrexia: All Will Be One expansions.

Any time a player would pay a mana cost for anything, it costs {1} more mana to activate. (This includes casting spells, activating abilities, turning face-down creatures face up, paying for Ghostly Prison, the weird ability on Quenchable Fire, etc.)

Creatures you control get +X/+0, where X is the greatest number of consecutive nonland, nontoken permanents in a mana curve you control. (For example, if you have permanents with mana value 3, 4, and 5, creatures you control get+3/+0. If you're missing 4, they only get +1/+0.)

When The Keeper of Favorite Cards enters the battlefield or attacks, name a nonland card and write it on your favorites list for this game. (You can have limitless favorites.)
Your favorite creatures get +1/+0.
Whenever you cast a favorite noncreature spell, create a 1/1 white Soldier creature token.

First strike, vigilance
Heroic — Whenever you cast a spell that targets Anax and Cymede & Kynaios and Tiro, draw a card. Each player may put a land card from their hand onto the battlefield, then each opponent who didn't draws a card.

When you cast The Water Maro, create a token that's a copy of it, except the copy isn't legendary.
The Water Maro's power and toughness are each equal to the number of permanents you control that are tokens and/or have the word "Maro" in the name.

Rulebreaker — If Valko Indorian, Researcher is your Commander, you may include all artifacts and enchantments in your deck regardless of color identity.
Artifacts and enchantments you own everywhere become both types. (This applies to your library, hand, battlefield, and so on.)
Whenever you cast an artifact or enchantment spell, put a +1/+1 counter on Valko Indorian.

Prowess, deathtouch
When you cast Kallist Rhoka, you may choose a creature or planeswalker on the battlefield. Kallist Rhoka becomes a copy of that creature or planeswalker, and that creature or planeswalker becomes a copy of Kallist Rhoka.

You can't cast Keeper of the Yellow Hat during your first seven turns of the game. (Keep track if you're playing with this!)
When The Keeper of the Yellow Hat enters the battlefield, create a legendary artifact equipment token named Yellow Hat with equip {2} and "Equipped creature gets +4/+4 and gains lifelink."

The Chaos Keeper enters with a sealed Magic booster pack of your choice under it. (You provide a new pack each time.)
Whenever The Chaos Keeper deals combat damage to a player, reveal its cards and put one of them into your hand. (Don't open the booster pack until the first time this ability reolves.)

Treat your effects that scale off of "players" or "opponents" as though there were one more. (For example, with myriad you'd make an additional token that's just attacking nobody, and with Braids, Arisen Nightmare, you'd draw an additional card.)

You can sacrifice creatures and artifacts interchangeably. (If an effect asks you to sacrifice one of them, you can sacrifice either.)
{1}, {T}, Sacrifice another artifact or creature: Put a rebuilding counter on Slobad.
{T}, Remove 3 Rebuilding Counters from Slobad: Create a token that's a copy of Bosh, Iron Golem.

Grumpy Co-play — When The Egotistical Velociraptor enters the battlefield, if you cast it, you may choose another Magic player not currently in a game of Magic and ask them to take over your game until the end of your next turn. If they agree, shuffle your hand into your library, draw four cards and gain 4 life. (You can't give them advice, but witty banter is encouraged.)

When The Keeper of Kaldra enters the battlefield, if it's the first time this ability has resolved this game, add Helm of Kaldra, Shield of Kaldra, and Sword of Kaldra as your companions. (You can pay {3} to put one into your hand from outside the game, once each. Use tokens to represent those cards.)
Creatures you control named Kaldra have hexproof.

Whenever the The Caffeinated Runner enters or attacks, create a Food token.
Sacrifice a Food: Target creature gains haste until end of turn. Whenever it next becomes tapped this turn, untap it.
Ready to run (You can have two commanders if both have ready to run.)

If it's neither day nor night, it becomes day as The Weekly Princess enters. (It becomes night next turn if a player casts no spells on their turn, and day if a player casts 2+ spells on their turn.)
Whenever night becomes day, put a +1/+1 counter on The Weekly Princess. Then if she has seven or more +1/+1 counters on her, she deals damage equal to her power to each opponent.
When The Weekly Princess leaves the battlefield, it stops being day or night. (Stop tracking it. Trust us, it's better this way.)

Islandwalk, swampwalk (This creature can't be blocked if defending player controls an Island or a Swamp)
Whenever The Milling Runner deals combat damage to a player, target player mills three cards.
Ready to run (You can have two commanders if both have ready to run.)

Before the game begins, if The Fifth Alias is your commander or in your deck, secretly make a list of five nonland cards in your deck. (Don't forget to do this!)
As you draw a card on your list, you may reveal it, show it was on the list, and exclaim its name. If you do, cast it without paying its mana cost.