Parley — When Selvala's Enforcer enters the battlefield, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on Selvala's Enforcer. Then each player draws a card.
Except in some very rare cases, the card each player draws will be the card revealed from the top of their library.
If Selvala’s Enforcer leaves the battlefield before its ability resolves, the top card of each library will still be revealed and drawn, although no +1/+1 counters will be placed.