When its alliance ability triggers, it will give itself a +1/+1 counter
But you still need to find a way to draw some cards to actually damage your opponent or have a mana sink to use to convert your infinite mana into something useful, like Origin Spellbomb or Sunbeam Spellbomb, which you can use with Auriok Salvagers to bring back and sacrifice infinitely since you have infinite mana
Because it basically bargains better than Beseech the Mirror and is in that color too, this is better and since its mass sacrifices and mass recursion are better for those same archetypes but many more
Some of the reprinted cards are super exciting, as many players have been begging for those to appear again in Standard format
Its fun to feed to Szeras, too
While their counterparts have the same abilities and traits, the alternate art is generally stunning with foil