One of the key problems with powerful cards in multiplayer is that they are often destroyed or feared
While it compares poorly to all-star land cycles like the Shock Lands, this is still a fantastic piece of fixing
Bonus: "Kaldheim's Itogumo" (Webspiner) This spider, which appeared in Kaldheim, also has Reach like the Giant Spider, but its cost is 1 lower, and its power and toughness are reversed at 4/2, making its usability quite different
Diversion Unit Having a counterspell attached to a good flying creature is usually good in Constructed MTG, and in this case, you dont even need to tap it
Assuming you have at least three mana, and there are enough creatures in play, you can play Demonic Tutor, put Blasphemous Act into your hand and then cast it, all in the same turn