Whenever a face-down creature you control dies, return it to the battlefield face down under its owner's control if it's a permanent card, then turn it face up
The only mono-blue card with "untap all lands" is Reset, by far the oldest card
Aragorn can share counters with other counter types, too, such as widely-used +1/+1 counters, but green and white have other, better options to give +1/+1 counters to all their creatures and pump the team
It also means they can keep cards safe that might otherwise be messed up by hand disruption like being made to discard a card
Also, counterfeiters got better and heightened their skill in creating those cards
As a card drawer, Blast of Genius actually has a passable rate and could potentially help justify a control deck without Sphinxs Revelation