Another option is Aetherflux Reservoir, which allows its controller to pay 50 life to deal 50 damage to any target
If you are not up to 20% lands in your cube yet find people are struggling with their playables then I suggest refining your cube and culling the narrow and less played cards as the first plan of action
If your deck needs to win early or has ways to filter weaker cards later in the game and has a healthy number of cards this accelerates it should probably be a consideration for your deck (assuming it as already blue which most artifact heavy decks are)
Check this out: If your opponent in control of Hive Mind plays a couple of Pacts, you are facing a bitter destiny unless you happen to control a Sundial of the Infinite, whose ability will exile the triggers of your Pacts (the copies gifted to you through Hive Mind) from the stack, and you wont be facing the choice of paying lots and lots of mana (which you might not even have access to) or losing the game
Belle, Snowfield Strategist Enchanted, 236/204 Youll notice a very similar illustration style across most of the cards on this list
Use some Water Pokemon in your deck because he does use Ponyta and Rapidash, which will easily knock out your Grass Pokemon