Forgotten Sentinel

A 4/3 for four mana is a fine body, right at the curve for a beater that trades up more often than not; the whole design question is what the enters-tapped clause is buying back. The answer is nothing for you and nothing for anyone else: it is a flat tempo tax, a turn of summoning-sick vulnerability with no keyword, no trigger, and no upside attached. Golems are the game's generic-artifact tribe, the type Wizards reaches for when a creature needs to be metal and unremarkable, and this is filler in that tradition, a body whose reason to exist lives outside its own text box. It waits for something that cares about artifacts entering, about raw creature count, or about a cheap colorless body it can feed to a sacrifice engine before the tapped drawback matters. The enters-tapped line is the kind of downside designers hang on an otherwise plain creature to keep it from being too clean in aggressive decks, though the tax it imposes is so mild that it mostly reads as texture rather than a real cost. On its own terms there is little to recommend it, which is precisely what a card like this is for: it is scaffolding, a number on the battlefield waiting for a structure to attach to.