Tessa is playing Loose Cannon against Nora. Tessa has two Flame Chompers in their base and another Flame Chompers at a battlefield. Nora has a 1 [M] Recruit token at the other battlefield and a Premonition in hand. At the start of Tessa’s turn, they have three cards in their hand. After drawing for turn, Tessa moves one of their Flame Chompers to the battlefield they control and then moves their other Flame Chompers to the battlefield Nora controls and conquers it in the ensuing combat. Afterwards, Tessa hides a Teemo, Scout at the battlefield and passes the turn. When during Tessa’s turn could Nora have played their Premonition? Select all answers that apply. A. During Tessa’s Beginning Phase. B. During Tessa’s Draw Phase. C. During the showdown where Tessa moved Flame Chompers to the battlefield they control. D. During the combat when Tessa moved Flame Chompers to the battlefield Nora controlled. E. When Tessa hid a card. F. During Tessa’s Ending Phase.

Partly — only A and D.

A and D are the windows: Nora can play Premonition in response to Loose Cannon's Beginning-Phase trigger, and during the Combat Showdown at her own battlefield. Loose Cannon's trigger still goes on the chain even with 3 cards in hand — the "if you have one or fewer cards" clause comes after the draw instruction, so it's part of the effect, not the trigger condition — and that chain is what gives Nora priority; it then resolves drawing nothing.

C is the trap: moving a Flame Chompers to a battlefield Tessa already controls never applies Contested, so no Showdown is ever staged there (CR 190.3.a) — and the move itself is instantaneous and can't be reacted to.

B, E and F give Nora no window at all: the Draw Phase and Ending Phase have no chain and no Showdown (only the turn player has priority in a Neutral Open state), and hiding is a Discretionary Action that explicitly does not open a chain (CR 811.1.c.2).

One practical note: Premonition costs 2 energy + 3 Mind, so Nora also needed runes she deliberately left readied from her own turn, since runes only ready in their controller's Awaken Phase.