Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control
I wish I had a Predator Ooze in my starting collection (and you can, with the Foundations Starter Collection!)
the rest of the table often unites to stop these aggressive decks from running away with the game, so these decks must be tuned faster and even more aggressive to outpace all of the opponents
In addition to Urtet's ability which can be played before combat allowing you to untap and swing with massive Myr creatures, the deck features a number of different anthem and +1/+1 counter effects to pump your board including Master of Etherium, Steel Overseer, Urza Prince of Kroog, Chief of the Foundry, Myr Galvanizer, Tempered Steel, etc
So lets discuss cards that give you hexproof specifically