(I do have all three variations, but Nate managed to capture them on camera a lot better than I would be able to.) Coming back to the regular English unlimited edition Base Set Pikachu we have as template: there are three distinct versions of this particular card
After that initial boost, it keeps adding +1/+1 counters any time another shrine enters the battlefield, which makes your army grow bigger and scarier over time
Brutal Hordechief: I would play Brutal Hordechief with the first ability alone, especially since I like attacking with large armies
While it does not carry the prestige of the Special Illustration Rare version sitting at the top of this list, the Ultra Rare still gives collectors a premium Mega Charizard X ex card at a fraction of the cost, and it consistently sells in higher volume than the SIR or Mega Hyper Rare simply because more players and collectors can reach that price point
Probably nothing to worry about there
games in which players might see rules familiar to the real game