You can spend all your mana on mana rocks, creatures, or win conditions and counter the one spell that would stop you
This yellow and blue impact statement from Olena Richards is a Counterspell for the ages
Gallery and List of Alliance Cards Attended Socialite Back-Alley Gardener Boss's Chauffeur Celebrity Fencer Devilish Valet East Wind Avatar Elegant Entourage EPF Point Squad Gala Greeters Galadriel, Light of Valinor Lita, Little Orphan Amphibian Mighty Mutanimals Mutant Town Musicians Raphael, Most Attitude Raphael, Tough Turtle Rose Room Treasurer Rumor Gatherer Sizzling Soloist Slash, Reptile Rampager Social Climber The Neutrinos Venom Connoisseur Wingnut, Bat on the Belfry Witty Roastmaster For those who play exclusively on MTG Arena, there are some Alchemy rebalances and digital-only cards with alliance
When the 4 creatures are on the battlefield together, you activate Mirror Entity's ability for roughly a thousand times (or realistically as many times as u want) and X=0
Acidic Slime Acidic Slime is just annoying
You can very well pay the life if you have it to spare, like against control and combo decks