When to Open Packs When you open your packs depends on what you're trying to do: Do You Want to Just Have Fun and Enjoy Yourself
You can recur most of your combo pieces with Teshar or one of the retrieving creatures, and some of the available combo pieces can perform double duty as protection, too
Pyroconvergence and Hold the Gates were pretty weak engines in Return to Ravnica and Gatecrash, but they provided different things to value and could pay off big-time
The idea here is that they upgrade your Clues into super-Clues, so to speak
At these events, exclusive pins and other items can be bought
The goal is to dump your hand, playing three lands every single turn, often from your graveyard with Crucible of Worlds or Ramunap Excavator