Kiyomaro, First to Stand really needs a full hand for you to enjoy playing it
If you're playing casually, theres nothing stopping you from adding them to your deck, but if youre considering following a tournament format, you should check which cards are banned
You can use the ability defensively against the Underworld Dreams match up
One is to focus on the fact that for most Secret Lairs , you really aren't getting a big discount by buying them directly from Wizards compared to buying them on the secondary market a couple of months after they are released, so you're probably best off waiting and just picking up specific cards you want as singles, especially if you don't really care about all of the cards in a drop and just want one or two
The Perfect Collection for your Pokemon Fan, contains Mostly English cards and can contain Commons, Holos, Rares, and Uncommons