Assertion: card's set | /r/CapableOf | feature only one event deck
Facets:
Source sentences:
text: Beginning with Dragon's Maze , each set featured only one Event Deck.
text: Each set from Mirrodin Besieged to Gatecrash featured two Event Decks, which were pre-constructed decks designed as an introduction to tournament play.
text: Beginning with , each set featured only one Event Deck.