The Joker/Prime

The  Joker Prime  may be one of the better Silver Cards with decent  special attacks  and  passive, coupled with good  damage. He can  poison  your foes with his second special, reducing target's damage output for the duration. Should it be that he faces his end, his opponent would take a harsh blow as well - 30% of their maximum  health  instantly. His great synergy with  Harley Quinn/Prime  makes for a good, affordable team.

Strategy
As of 2.15, his passive is bugged and can only trigger properly if knocked out with basic attacks or super moves. If knocked out with a special, no damage is dealt. However, in update 2.17, this bug was fixed.

Abilities
Here are Joker's abilities.

Support Cards and Gear
Here are Joker's support cards and gear.

Trivia

 * Even if he did NOT deal any damage, upon being KO'd, the amount of health that the opponent lost from his passive will actually be counted as the total amount of damage that he dealt instead.
 * The same can be said for both Black Adam/Prime and Black Adam/Regime, if they did not deal any damage from attacking, but instead reflected back the damage from the attacker.
 * Both him and The Joker/Insurgency are the only ones with the exact same passive descriptions (although both reduce different amounts of health).