This is awesome with Group Hug since one Howling Mine triggers it in everyone else's turn
Eluge, the Shoreless Sea Eluge, the Shoreless Sea is a slick cost reducer that drops those single cantrips down to free-spell status immediately, Opt for 0 mana is great, even if it's restricted to the first spell of the turn
All in all, with all reprints, variants, alternate arts, Arena versions, and promo cards, you're looking at a grand total of 90,870 cards
Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren't included in the ability's reminder text
It was a very different playstyle for mono-blue even with aggressive mulligans