At the start of your combat step, all your Merfolk creatures explore, revealing the top card of your library and putting it into your hand if its a land, or giving that Merfolk a +1/+1 counter and then letting you choose to keep it on top of your deck or into your graveyard
This is a good card, but one that requires being used in a specially-prepared deck - preferably a deck loaded with sorcery and instant cards for dealing damage, as opposed to lots of creatures
So be careful when choosing what to enchant and when
That being said, blue and blacks draft archetype in Commander Legends: Battle for Baldurs Gate is built around the initiative, and therefore it does have slightly more cards that care about it than the other colours
Since they are cursed with 'turn 1' or 'tap-in' restrictions, it seems difficult to aim for infinite combos