Golgari Decoy

The "lure" effect compresses two roles into one body: it forces every creature that can block to gang up on this Elf, which on offense turns a swung 2/2 into a board-clearing tarpit that soaks an entire defensive line so your other attackers get through unblocked. The trick is that lure has always been a payoff in search of a delivery system, and the scavenge clause is the second half of the answer. After the Decoy dies (or after it has done its lure work and you no longer need the body), you exile it from the graveyard to staple counters onto whatever survived, so the card refuses to become a dead draw late. That timing matters: scavenge is sorcery-speed and reads the card's power off the graveyard, so the two counters it grants are fixed regardless of the +1/+1 counters you might later pile onto the recipient. The lineage here runs through the long tradition of forced-block creatures, from Lure itself down through bodies that taunt the whole board; what distinguishes this one is that the design pays you twice for a creature whose first job is to die well. It is built to attack into a clogged board, eat the blocks, and then come back as a sorcery-speed counter spell from the yard.