japanese pokemon cards mega Premium Trainer Box With 10 boosters in the box Mega Dragonite ex SAR 246/193

With Biorhythm, you could be in danger of going from 40 life to 0 all because you didn't have a creature in play, and that's the issue

Retail Stores may only allow proxy cards in your Events as described in the current official Magic Tournament Rules

Considering what the Silent Kings card is, you may even want to play with Imotekh as the commander out of the box

While the planeswalkers are better in a vacuum since you get to choose what abilities you want to use each turn and they don't automatically get sacrificed on the third turn, they also have a nasty habit of being killed prematurely by opposing creatures, which the saga doesn't worry about