From Guild Wars 2 Wiki
— In-game description [?]
- Pulses periodic stacks of 1 second blind over it's duration. Apparently the base amount and timing of these pulses is different for the Thief vs. Engineer's Toss Elixir U: 9 pulses for Thief, 11 for Engineer.
- Cannot block unblockable siege missiles in WvW.[verification requested]
- Smoke Screen is also one of two possible outcomes of Engineer's Toss Elixir U.