Magic: the Gathering Thrive and Thrash Simic Event Deck GTC MTG. The Simic Combine has a new agenda for a new era: reclaim the recently uncovered seas and then restore the Ravnican wilderness. The "Thrive and Thrash" deck opens the game with a focused effort to quickly develop its available mana. Once you"ve assembled massive amounts of mana generation, follow through with gigantic monsters and game-winning spells. Your opponents will be helpless against the sheer power of your late-game plays.