If Singularity is played on Hwei, and the opponent reacts with Tideturner to move Hwei around, can Hwei use his movement trigger still or does he die to Singularity first?
Whether Hwei survives or his movement trigger occurs depends on the exact sequence of the chain.
According to the Showdown Timing and Chain Rules, when your opponent plays Singularity, they place it on the chain. Because it is a spell, it creates a CLOSED state, allowing you to react.
The Sequence
- Opponent plays Singularity: It targets Hwei and is placed on the chain.
- You react with Tideturner: You play Tideturner (from Hidden). Since this is a [Reaction], it is placed on the chain on top of Singularity.
- Chain State: The chain now has Tideturner on top and Singularity below it.
- Chain Resolves (LIFO): The chain resolves from top to bottom (last in, first out).
- Tideturner resolves: You perform its ability, swapping Tideturner and Hwei.
- Hwei's trigger: Because Hwei has moved, his "When I move" triggered ability triggers. This is placed on the chain (on top of the remaining Singularity).
- Hwei's trigger resolves: You draw and discard, gaining the associated benefit.
- Singularity resolves: Finally, Singularity resolves. It deals 6 damage to Hwei (assuming he is still a legal target, which he is, as Singularity does not have a location restriction).
Will Hwei die?
Yes, he will likely die.
- Hwei has 5 Might.
- Singularity deals 6 damage.
- Since the trigger resolves before the damage is dealt, Hwei will perform his movement ability (draw/discard and get his bonus) first. However, once the Singularity trigger resolves immediately after, he will have 6 damage marked on him. Since 6 damage is greater than his 5 Might, he will be killed and sent to the trash.
Summary: You do get to use his movement trigger, but he will be killed by the Singularity immediately afterward.
This is my interpretation based on the LIFO resolution of the chain and the timing of triggered abilities. No official FAQ exists for this specific combination.