Siona Captain of the Pyleas and Reins of the Vinesteed
Siona, Captain of the Pyleas does not work with Reins of the Vinesteed
Siona is on the board with 2x Human Soldier tokens created by her. One token is enchanted with Reins of the Vinesteed. The enchanted token is destroyed.
Actual: Reins of the Vinesteed returns from the graveyard and is targeted at the remaining Human Soldier token. The token becomes enchanted and triggers Siona's ability. Siona's ability appears in the Triggered Abilities window but cannot be placed on The Stack. Game becomes stuck, cannot yield, only possible choice is to Concede.
Expected: Siona's triggered ability goes on The Stack and creates another 1/1 Human Soldier token.