These cards have a completely different artistic style from the main set
Many of these early sightings were later confirmed, showing that the late-season leaks closely matched final designs
If players have any cards in hand that allow actions to be taken with them from a player's opening hand, the starting player takes all such actions first in any order, followed by each other player in turn order
Note that not all color combinations will be represented, but any that contain legendary creatures that directly enable a strong token strategy as their primary focus (using at least 1 of the first 3 criteria above) will be discussed
Still, MTG players are a wily lot and the most insane skilled players will find a way to make this pop off.
If you have cheap utility dorks and useful things to do with pointless bodies (such as Recurring Nightmare or equipment) then Skirsdag High Priest is a potent tool, if not he is liable to not do anything