This card is straightforward, but has been met with a lot of questions and a surprising amount of hate for being "Worse than Arcane Intellect". Let us try to unpack this card a bit to see how good it is. What is the value of overload, anyway? Do you think of Lava Burst as a 3 cost or a 5 cost? What is this?
First things first. If you have 2 mana 2 overload, that's still 4 mana. 4 mana is 4 mana, so you have to compare this card to other 4 cost cards. However, the fact that part of that cost is overload is a slight upside inherent to the card; the more of the total cost is overload, the more the advantage. Outside of warlock, for instance, 2 mana buys 3 damage and a slight upside (Quick Shot, Frostbolt). Shamans have this in the form of Lightning Bolt. Two mana, 3 damage with the upside of 1 mana of the cost being overload. Alternatively, a 3 mana class minion is worth 3/4 stats and an upside (Dark Cultist); Shamans have Totem Golem, which is a 3/4 for 3 with an upside of 1 cost being in overload. 3 mana buys a 2/3 weapon with an upside (Coghammer); Shamans have Stormforged Axe, which is a 3 mana 2/3 weapon with overload as an upside.
The reason that Overload is actually an upside is because paying mana next turn is better than paying mana this turn. Why? If you pay a card with a partial overload cost, you can use the mana you would have had next turn on the current turn. If you play a minion with this mana, it can attack the next turn, rather than the turn after if you had paid the overload cost up front. Alternatively, you can use Overload cards far sooner than the curve. If you play Earth Elemental on turn 5, you can use it to change the game FAR sooner than if it were an Ironbark Protector. You can play Earth Elemental against Face Hunter and at least they'll have to use their Ironbeak Owl to deal with it, but by turn 8 for Ironbark Protector, Face Hunter usually is either in kill range with direct damage spells and hero powers, or completely out of steam. This part is also why Totem Golem is an insane card; you play your three drop turn 2 and eat your opponent's two drop, giving a safe board to play your own two drop.
I've heard clamoring for this to be 1 overload, but that's insane. At 1 overload this is Arcane Intellect, plus the overload upside. However, is the advantage of 2 overload worth the fact that it costs 1 more than Intellect? The advantage of playing this earlier than the curve is naught because (A) this does the same thing whether played turn 1 or turn 10, (B) it does nothing to change the board, and (C) having exactly 1 mana on turn 3 is tremendously awkward. Playing this on turn 2 is forfeiting the game in most cases. In fact, unlike with Intellect, playing this on turn 3 is also forfeiting the game, which is a massive disadvantage. The only real advantage of this card is leaving 1 more mana open the turn you play it when played later. The obvious use of this is to combo with Chromaggus, but another use for this card is as an "Oh my gosh, I need ONE more burst card for lethal. Can draw into it?" tool. You'll have 1 more mana the turn that you play it to make it more likely you can afford whatever you draw. These are fairly uncommon advantages, however, and the disadvantages are far clearer.
I'd call this generally worse than Arcane Intellect; however, the fact that is for Shaman gives Shaman something. Darkbomb's strict inferiority to Frostbolt and Quick Shot never stopped its usefulness in Warlock decks. However, this probably is only good in decks that really have good use for the card draw, such as Malygos based decks; it isn't like Arcane Intellect where you can simply stick it in any old Mage deck and expect it to do work.
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What will Mage do when:
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my mech shaman needs you <3 <3 <3
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So much gun fight !!!
But one who hits quickly gets the jewel. I Quick Shot the remaining health of your Stormpike Commando pew pew!!
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Yet again Redemption saves the day and summons Kel'Thuzad which inturn summons another Kel'Thuzad and Sylvanas Windrunner during the turn end.Got Ninja'edOld Man wants to have a word Big Game Hunter
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Did U forgot that I used Innervate + Faceless Manipulator on my Baron Geddon and it doesnt have Necroknight as an adjacent minion.
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Shredder is by far one of the most used 4 drop card. But that does not mean it should be nerfed. It is really good card that can go both ways. If I am not wrong then it is one of those cards that makes the game interesting simply because of its RNG.
So if you are asking to nerf it that means you are asking to remove one among many elements of fun in this game. So for me its a NO.
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Yes Tirion Fordring, you shall not pass