The key here is that Byrke, Long Ear of the Law doesn't have to be the creature attacking, so you can get double counters on two attackers the turn Burke enters, and it gets out of hand on subsequent turns
But not being a counter makes it better against some decks and in some situations, like against a Cavern of Souls/Allosaurus Shepherd deck
Kakuna (151) Also about $3
Many combo decks have used the Stroke as a kill card, including High Tide, Tolarian Academy, Power Artifact combo, and Aluren
Another member of the powerful Dragonlord cycle, Silumgar saw a ton of Standard play in Esper Dragons
The Magic: The Gathering head designer first learned about Wizards of the Coasts third-party IP licensing initiative in a meeting with WotC vice president of Magic design Aaron Forsythe