Cast this spell only during the declare attackers step and only if you've been attacked this step.
This turn, whenever an attacking creature deals combat damage to you, it deals that much damage to its controller.

+1: Draw a card, then add one mana of any color.
−2: Create a 4/4 red Dragon creature token with flying.
−8: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

If you control a commander, you may cast this spell without paying its mana cost.
Creatures you control gain indestructible until end of turn.

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?)

Flying
Whenever Tamiyo attacks, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
When you draw your third card in a turn, exile Tamiyo, then return her to the battlefield transformed under her owner's control.

+2: Look at the top card of target player's library. You may put that card on the bottom of that player's library.
0: Draw three cards, then put two cards from your hand on top of your library in any order.
−1: Return target creature to its owner's hand.
−12: Exile all cards from target player's library, then that player shuffles their hand into their library.

10,000 Needles — Whenever this creature attacks, it gets +9999/+0 until end of turn.

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Reach, first strike
Vigilance, menace
Trample, lifelink
Ward—Pay 7 life.

This land enters tapped unless you have two or more opponents.
: Add or .

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

If you would put one or more counters on a creature or planeswalker you control or on yourself, put that many plus one of each of those kinds of counters on that permanent or player instead.
Choose a Background (You can have a Background as a second commander.)

When Fioran Reformist enters the battlefield, if a player is the monarch, get rid of the monarchy.
Democracy is in effect until Fioran Reformist leaves the battlefield. (At the beginning of each player's end step, if they control more creatures than each other player, they draw a card. Players can't become the monarch.)

(: Add , , or .)
This land enters tapped.
Cycling (, Discard this card: Draw a card.)

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Price of Progress deals damage to each player equal to twice the number of nonbasic lands that player controls.

(: Add or .)
This land enters tapped.
When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Search your library for a legendary creature card, reveal it, put it into your hand, then shuffle.

Shroud (This enchantment can't be the target of spells or abilities.)
: Put X tower counters on this enchantment.
At the beginning of your upkeep, if there are 100 or more tower counters on this enchantment, you win the game.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
Search your library for a card, exile it face down, then shuffle. If this spell was bargained, you may cast the exiled card without paying its mana cost if that spell's mana value is 4 or less. Put the exiled card into your hand if it wasn't cast this way.