One of the current favoured tactics in Hearthstone is a, Grim Patrons, and Frothing Beserkers combo play that can do upwards of 30 damage, with very little chance of the defending player avoiding it.
Unsurprisingly, the Warrior build that lets you make this play has dominated recent tournament and competitive events. That will no longer be the case, however, as Blizzardplans to nerf Warsong Commander in an upcoming balance patch.
Instead of “Whenever you summon a minion with 3 or less Attack, give it Charge”, Warsong Commander now reads: "Your Charge minions have +1 Attack." That means the combination play with Grim Patrons and Frothing Beserkers will no longer be viable. The patch is set to drop sometime next week.
"Going forward," says Blizzard, "we will continue to stand by our stance that we will only make adjustments to cards when we feel it is completely necessary and allow the injection of new cards into the game help our players define what the meta evolves into. In the case of Warsong Commander, we felt this change was necessary to help expand both future design space and to stand by our overarching game philosophy that battles between minions and fighting for board control is what makes Hearthstone fun and compelling."