Writers are so lazy that [finish joke later]
If it was a unique card with a unique (and probably super-awesome) ability, I would be vehemently against it
In this event, in particular, simply participating in 10 battles will earn you a total of 24 Pack Hourglasses
Retrieved April 8, 2010

Arcee, Sharpshooter Blaster, Combat DJ Blitzwing, Cruel Tormentor Codsworth, Handy Helper Curie, Emergent Intelligence Cyclonus, the Saboteur Dragon Man, Reformed Robot ED-E, Lonesome Eyebot Error-9, Viral Node Flamewar, Brash Veteran Goldbug, Humanity's Ally H.E.R.B.I.E., Lovable Robot Jetfire, Ingenious Scientist Jocasta, Automaton Avenger K-9, Mark I Kilo, Apogee Mind Krang, Utrom Warlord Krang, the All-Powerful Liberty Prime, Recharged Living Brain, Mechanical Marvel Machine Man, Model X-51 Megatron, Tyrant Mendicant Core, Guidelight Metalhead Omega, Heartless Evolution Optimus Prime, Hero Prowl, Stoic Strategist Ratchet, Field Medic Rex, Cyber-Hound Rose, Cutthroat Raider Slicer, Hired Muscle Soundwave, Sonic Spy Starscream, Power Hungry Super-Adaptoid The Motherlode, Excavator The Vision Tri-Sentinel, Act of Vengeance Ultimo, Civilization's End Ultra Magnus, Tactician Ultron the Annihilator Ultron, Artificial Malevolence Ultron, Machine Overlord Ultron, Unlimited Vision, Spectral Synthezoid Vision, Synthezoid Avenger Viv Vision, Teen Synthezoid Yes Man, Personal Securitron

We ship securely across the U.S., ensuring your sealed booster box arrives in perfect condition