Compared to Divination, its a significant improvement: adding scry 2 in exchange for two life is well worth it and can really smooth out your draws
A creature's activated ability with the tap symbol or the untap symbol in its activation cost cant be activated unless the creature has been under its controller's control since the start of his or her most recent turn
And while this led to several cards like Windfall and Stroke of Genius being banned in various formats, all of these shenanigans were made possible by one card, Tolarian Academy
In fact, I would tend to prefer a 3-mana Walker that does this with a +1 over a 5-mana Walker that just draws a card and mills one (Jace, Memory Adept)
Sure, children going into the store will be happy to spend their pocket change for a chance at a Charizard V, but selling cards at scale requires a lot of knowledge and ability to pivot
Sacrifice Murderous Redcap to Goblin Bombardment, dealing 1 damage to any target Redcaps Persist returns it with a -1/-1 counter Celes triggers, adding a +1/+1 counter to each creature you control The +1/+1 and -1/-1 counters cancel out Redcaps ETB ability resolves, dealing 2 damage to any target Repeat the loop for infinite damage and infinite ETB/death triggers Upgrade Your Combo Why stop at damage