Cards with the indestructible ability cant be sent to the graveyard (killed/destroyed) by taking lethal damage or by cards that say destroy
Basic Energy and Special Energy cards also display the Energy symbol in the middle of the card
It's often paired with Guide of Souls which will gain life when a creature enters the battlefield which in turn will ensure Ocelot Pride triggers and give you a ton of energy counters
Then we have the Stellar attack, which (and we dont say this lightly) is phenomenal
Masters sets foils are a bit weird, and this will likely be double true of Double Masters thanks to VIP booster, which will greatly increase the supply of foils in the set
4 Switch, 2 Escape Board, 3 Guzma These help in resetting Flare Strike in case you need to, while also providing extra resources if you switch into a Jirachi in the meantime