The mutate cost is low, so you can find something with a large and variable-sized body like Lord of Extinction, get some trample with Sawtusk Demolisher, and then go to town
Making a player lose three life for every land played adds up quickly, and the counters let Ob Nixilis deal the last points of damage itself
Guilty Pikachu (bottom right) In contrast, guilty Pikachu is curled up and seated
Most events will have Swiss rounds to start, then the top players go into a top cut bracket where you must win to progress
+N/+N (on Auras) -N/+N (on spells) -N/+N (on Auras) +0/+N (on creatures) +0/+N (on spells) +0/+N (on Auras) +N/+N to your team, one-shot +N/+N to your team, ongoing Damage prevention (Prevent the next N damage that would be dealt to target creature/player.) Damage redirection (Prevent the next N damage that would be dealt to target creature/player this turn
However, event decks were discontinued after the set Battle for Zendikar