Getting rid of your opponents mana rocks and tricky enchantments (and your own, but never mind that) and getting a huge beater with the deal
If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield
Some Restrictions Mad Auntie | Illustration by Wayne Reynolds If you're thinking that regeneration makes your creature invincible, wait until you learn about its restrictions
This deck really wants cost reducers like Pearl Medallion and Thornscape Familiar to flood the board
Havoc Eater has the potential to be an enormous creature
Thankfully, for players new to Pokmon TCG there is a full tutorial, walking you through the basics, which as a player new to the card game, I found vital in learning the rules