arcane rising booster box Unlimited Edition Pack – Face to Face Games Approximate cards per pack Flesh and Blood - Arcane

While a 6/6 creature is not all that imposing, Deep Spawn has the ability to make itself untargetable until end of turn for just a single blue mana, effectively has some form of evasion with the Trample ability, and also mills cards from the top of your deck in to your graveyard during your upkeep (which can fuel further reanimation shenanigans on future turns)

This includes Trainer Cards such as the Supporter, Worker, which discards a Stadium in play, or Lost Vacuum

for now, well focus on the one for which the cards were made

First you can counter all spells which will shut down a storm stack, copies and main like Chandra above, or just a Cancel for the same mana