Entity Tracker 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
Flash Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, draw a card.
Complete guide
Entity Tracker is a versatile Human Scout that rewards you for leaning into enchantment-heavy strategies. With Flash and the powerful Eerie keyword, it ensures your hand stays full as you expand your board or explore haunted Rooms.
Understanding Eerie
The Eerie ability is a triggered ability that watches for two specific events: an enchantment you control entering the battlefield, or you 'fully unlocking' a Room. Because Entity Tracker has Flash, you can cast it on an opponent's turn to surprise them with a blocker or to immediately start gaining value from incoming enchantments.
Unlocking the Value
When an enchantment enters the battlefield under your control, the ability triggers once. If multiple enchantments enter at the same time as Entity Tracker, it will see all of them and trigger for each one. Furthermore, 'fully unlocking' a Room means you pay the cost for the final locked door of a Room permanent you already control, or you play a Room and somehow unlock both doors simultaneously.
Common Mistakes
A common point of confusion is what counts as 'fully unlocking.' If you cast a Room and only one side is unlocked, that does not count as fully unlocking; you must unlock the remaining door later. Also, remember that Entity Tracker is a creature, not an enchantment itself, so it does not trigger its own ability when it enters.
Strategic Timing
Since Entity Tracker draws cards, it is best played early in an enchantment-based deck. Use its Flash ability to wait until the end of your opponent's turn, ensuring it survives to see your next main phase where you can drop enchantments and immediately replace them in your hand.
Interaction examples
Roaming ThroneIf you have Roaming Throne on the battlefield with 'Human' chosen as the creature type, Entity Tracker's Eerie ability will trigger twice whenever an enchantment enters or a Room is fully unlocked. This allows you to draw two cards instead of one for every trigger event.
Solemn SimulacrumWhile Solemn Simulacrum provides excellent ramp and a death trigger for drawing, it is an artifact creature, not an enchantment. Playing Solemn Simulacrum will not trigger Entity Tracker's Eerie ability. However, having both on the field provides a robust engine for maintaining hand size through both enchantment entries and creature deaths.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Entity Tracker
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If a permanent with an eerie ability enters at the same time as one or more enchantments, its ability will trigger for each of those enchantments.
No other card is named in this ruling.
- #2· Wizards of the Coast
An ability that triggers "whenever you fully unlock a Room" triggers when a door becomes unlocked and the other door of that Room is already unlocked, or when both doors of that Room become unlocked simultaneously.
No other card is named in this ruling.
Legal formats
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Meta decks with Entity Tracker
No archived Top 8 deck with this card yet.