Put that card onto the battlefield tapped under your control and the rest into their graveyard. Being able to mill an opponent to not only remove their best cards, but also steal their lands, is an awesome ability
To cut down on shuffling, we've started to do more effects where you "tutor" just from a handful of cards from the top of your library, usually four or five
You can dish out +1/+1 counters and ramp faster since all your merfolk explore, and Hakbal doesnt need you to tap anything to accelerate
So it is with Squirtle #29 Reverse Holo from the 2012 set Boundaries Crossed
This gives the next cast spell flash, plus you can put X +1/+1 counters on a creature, where X is the mana cost of the spell
Braingeyser Braingeyser still does the work, but as a sorcery that only targets one player