If youre evaluating these as upgrades for an existing deck, you should be able to figure out how the sequence of play creature, cast sub-spell, prepare again fits into your curve for each card
Card Set(s) -THE TIME OF BATTLE- [OP-16] CARD VIEW OP16-098 | SR | CHARACTER Yamato Attribute Strike Block icon 5 Effect [On Play] Draw 1 card and trash 1 card from your hand
Because it makes all cards Blue in all zones, it means Llawan will bounce all opposing creatures and then prevent your opponents from casting all of those creatures
It won't change a roll of the planar die, but you might get to say something like "I rolled chaos plus 2," which is a pretty cool thing to say
And now, with this guide to follow, you can put them to work for your decks, too