Pools of Becoming is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
At the beginning of your end step, put the cards in your hand on the bottom of your library in any order, then draw that many cards. Whenever chaos ensues, reveal the top three cards of your planar deck. Each of the revealed cards' chaos abilities triggers. Then put the revealed cards on the bottom of your planar deck in any order.
Complete guide
Welcome to Bolas's Meditation Realm, where the currents of the Multiverse are as shifting as the mind of the Dragon God himself. Pools of Becoming is a Plane card that forces constant adaptation, cycling your resources and cascading through the chaotic energies of your planar deck. Whether you are seeking a fresh hand or a flurry of chaos effects, this plane ensures no two turns feel the same.
A Fresh Perspective Every Turn
The first ability of Pools of Becoming is a mandatory triggered ability that occurs at the beginning of your end step. It requires you to place your entire hand on the bottom of your library in any order you choose, and then draw a number of cards equal to what you just moved. This ensures that you start every opponent's turn with a new set of options, but it also means you cannot easily save specific spells for future turns.
Cascading Chaos
When you roll the chaos symbol on the planar die, Pools of Becoming triggers a unique chain reaction. You reveal the top three cards of your planar deck, and every chaos ability on those revealed cards triggers simultaneously. As the planar controller, you choose the order in which these abilities are placed on the stack. After the abilities are triggered, the three revealed cards are placed on the bottom of your planar deck in any order. Note that Pools of Becoming itself is not in your planar deck while it is face-up, so it cannot be one of the revealed cards.
Planar Control and Timing
In Planechase, the 'planar controller' is typically the active player. If you are the active player when the end step begins, you control the draw trigger. If you roll the planar die and get a chaos result, you control the process of revealing cards and ordering their abilities. Remember that if a revealed card also has a 'Whenever chaos ensues' trigger, such as another copy of Pools of Becoming in a large enough deck, those new triggers will be put on the stack on top of the original ones.
When to Stay or Leave
Pools of Becoming is excellent if your deck relies on seeing many cards or if you have a planar deck filled with high-impact chaos abilities. However, if you have a hand full of essential combo pieces that you cannot cast yet, you may want to spend your mana rolling the planar die to planeswalk away before your end step begins.
Interaction examples
Sol Ring
Command TowerIf your hand contains Sol Ring and Command Tower during your end step while Pools of Becoming is active, you must put both cards on the bottom of your library. You then draw two new cards. This helps you dig through your deck for threats if you already have enough mana sources in play.
You roll the chaos symbol on the planar die. You reveal the top three cards of your planar deck. Suppose those cards have chaos abilities that allow you to create tokens, destroy creatures, or untap artifacts. You put all three abilities on the stack in the order you prefer. Even if you use an ability to untap your Sol Ring, the three revealed plane cards are moved to the bottom of the planar deck before the next player takes their turn.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Pools of Becoming
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
A plane card is treated as if its text box included "When you roll
, put this card on the bottom of its owner's planar deck face down, then move the top card of your planar deck off that planar deck and turn it face up." This is called the "planeswalking ability."No other card is named in this ruling.
- #2· Wizards of the Coast
A face-up plane card that's turned face down becomes a new object with no relation to its previous existence. In particular, it loses all counters it may have had.
No other card is named in this ruling.
- #3· Wizards of the Coast
The controller of a face-up plane card is the player designated as the "planar controller." Normally, the planar controller is whoever the active player is. However, if the current planar controller would leave the game, instead the next player in turn order that wouldn't leave the game becomes the planar controller, then the old planar controller leaves the game. The new planar controller retains that designation until they leave the game or a different player becomes the active player, whichever comes first.
No other card is named in this ruling.
- #4· Wizards of the Coast
If an ability of a plane refers to "you," it's referring to whoever the plane's controller is at the time, not to the player that started the game with that plane card in their deck. Many abilities of plane cards affect all players, while many others affect only the planar controller, so read each ability carefully.
No other card is named in this ruling.
- #5· Wizards of the Coast
The face-up plane card isn't currently part of its owner's planar deck. If the chaos ability is rolled by the owner of Pools of Becoming, Pools of Becoming is not one of the three cards that are revealed.
No other card is named in this ruling.
- #6· Wizards of the Coast
You may put the chaos abilities of the three revealed plane cards on the stack in any order. The last one you put on the stack will be the first one to resolve.
No other card is named in this ruling.
- #7· Wizards of the Coast
If one of the revealed plane cards is another Pools of Becoming, its chaos ability triggers. When it resolves, you'll reveal three more cards from the top of your planar deck, their chaos abilities will trigger, and you'll put them on the stack in any order on top of any remaining chaos abilities from the first Pools of Becoming's effect.
No other card is named in this ruling.
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