Hermit Druid + Thassa's Oracle

AI draft — not yet human-reviewed. Check citations and flag anything that looks wrong. How pages are reviewed.

Overview

If you cast Thassa's Oracle and its ETB triggered ability is on the stack, you may activate Hermit Druid in response; if Hermit Druid’s ability reveals your entire library (no basic lands) and puts all those cards into your graveyard, then when Thassa’s Oracle’s triggered ability resolves it will see X (your devotion to blue) and the current number of cards in your library (0) and you will win the game, per the Oracle text and the Hermit Druid ruling [108.1] [601.2h] Ruling [2025-01-24].

The StackRules & CitationsDetails & Edge Cases

Step 1

Cast Thassa's Oracle; when it enters the battlefield its triggered ability is created and put on the stack (you get priority with that trigger on the stack) [601.2h] [108.1].

Step 2

In response to the Oracle's ETB trigger, activate Hermit Druid's ability by paying and tapping it so that its ability goes on the stack above Oracle's trigger [108.1].

Step 3

Resolve Hermit Druid's ability: reveal cards from the top of your library until you reveal a basic land card, put that basic land into your hand (if any), and put all other revealed cards into your graveyard; if you revealed your entire library without revealing a basic land, all revealed cards go into your graveyard (Hermit Druid ruling) Ruling [2025-01-24] [108.1].

Step 4

After Hermit Druid's ability finishes resolving your library may now be empty (0 cards) if you revealed everything; then the Oracle ETB trigger resolves while Thassa's Oracle is on the battlefield and computes X as your current devotion to blue (which counts Oracle's if it is on the battlefield) [108.1] Ruling [2020-01-24].

Step 5

Thassa's Oracle's triggered ability checks whether X is greater than or equal to the number of cards in your library; with the library at 0 cards this condition is met (X ≥ 0) and you win the game per Oracle's instruction [108.1].

Resolution

Activate Hermit Druid in response to Thassa’s Oracle’s enter-the-battlefield trigger; if Hermit Druid mills your whole library (no basic lands), Thassa’s Oracle’s triggered ability will resolve with your library empty and you will win the game (Hermit Druid behavior: Ruling [2025-01-24]; timing/stack: [601.2h]; card wording: [108.1]).