empty pokemon booster pack Signed WOTC Base Set Unlimited Wrapper Charizard Am I missing something here?

It makes almost all of your spells cheaper (sometimes by as much as , the effects stack) while making all of your opponents spells cost more

While Jenova, Ancient Calamity is 4 mana and two colors, it also comes with some significant benefits to outweigh those extra costs

Yes, cost-reduction abilities reduce escape costs

This is typically at 10% based on the declared value, but but can range from between 5% and 30%

Do I need to use the same type of Pokemon in one deck

And then The Scarab God can exile a bunch of opposing creatures over time, thus providing gentle removal and pushback against the huge graveyard abuse that's common in the kitchen table metagame, all while giving you a powerful 4/4 body