The OCG only Counter Cards are all named uniquely except the one that is just named "Counter"
Cards like Bartolom del Presidio, Butcher of Malakir, and Yahenni, Undying Partisan all provide outlets to sacrifice your creatures while hurting your opponents
Vexing Radgull Unless you care about radiation counters specifically, Vexing Radgull is actually a less reliable source of proliferation than Thrummingbird
Each player who discarded a card with the greatest mana value among cards discarded this way loses life equal to that mana value
Plus, there are synergies with saddling mounts, crewing vehicles, and stationing spaceships
Easy win If your opponent sends out Kangashkahn as their first Pokemon, you can easily win by attacking Kangashkahn until it has a few HP remaining