Mobius and pet octopus
Member
Let's say the field is 3 webspinners vs 3 webspinners. It's turn 3. You went first.
If you play Arcane Explosion now, you will only have two mana left to spent on beasts but on their turn, they will have 3 mana to spend on 3 potential beasts on top of whatever Webspinners they have in their hand.
It's like, why would I ever want to give my opponents more options? It is tantamount to playing Arcane Explosion against a Warrior that has two Acolytes of Pain up. An even Webspinner trade at least gives both of you the same amount of beasts.
There's a card in MTG called Howling Mine.
In a vacuum, it's a bad card, because you spend 2 mana on YOUR turn to give them an extra card on THEIR turn. This is what Arcane Exposion/Consecrate is in this mode, at least in the early game.
Anyway all this is moot because the class cards are apparently random but this is how I see it.
In your scenario, after I arcane explosion and play another webspinner, I have 4/4 on the board and they have nothing. On their turn 3, whatever they play I can deal with. There is no 3 mana beast that has more than 4 health. These small advantages are what helps you win games. You have initiative and board control when you get a high value arcane explosion in this mode. And this mode is all about that, because the spells you get are random and unreliable, many classes are going to have a hard time swinging a match back in their favor.
I really don't understand why you think you're giving them more options. You're actually limiting a lot of options they have, because they could use those minions to go face or to trade. Sure, their hand is bigger now, but you have 4 minions on board that are going to give you 4 cards AND deal damage or trade with the minions they got from webspinner. Bigger hand size isn't going to win this mode. Very few beasts can effectively regain initiative, and some of them will be immediately unplayable or just terrible.
It is just a very basic value play. Option A: your opponent has 3 minions and 3 cards or option B: your opponent has 0 minions and 3 cards. Basically arcane explosion is option B. Option A is clearly stronger so you choose option B.
Howling Mine... totally different. As is acolyte of pain. Howling mine is not contesting board. Arcane explosion on an acolyte makes sense when it removes the acolyte and you have other things going on other than damaging a single 1 attack minion.
Consecration is a slightly different story though. That'll be useful in different situations seeing as it costs 2 more. The window for it to hit big is later, but also potentially bigger impact.