Blade Splicer
The body is a 1/1, but it is the least of what arrives: the card enters as a 3/3 first striker plus a fragile lord stapled to the side, and that split across two lines of text is the whole reason it has lasted. The token carries the stats, so it survives the spot removal that would otherwise two-for-one you. The trick is that the first-strike anthem is static and lives on the 1/1: kill the Splicer and the Golem keeps standing, but as a vanilla 3/3, no longer first-striking; kill the Golem and you keep the artificer that re-arms the next Golem you make. Either trade leaves the opponent a card short, and that resilience is what separated it from the run of vanilla beaters at its rate. The anthem is narrow by design: it scales only with Golems, so the payoff is reserved for decks that stack their own kin (Master Splicer and the rest of the line, or any Golem-token engine) rather than handing a free boost to your whole board. As one card it is a clean two-for-one; folded into a Golem package it turns a tribe of otherwise unremarkable 3/3s into a row of first strikers that win nearly any combat they block. The value and the synergy occupy different clauses, so the card pays whether or not the rest of the deck ever shows up.
