One of the key problems with powerful cards in multiplayer is that they are often destroyed or feared
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
abililty requires the player to return two cards to their hand to successfully deploy her, which can be useful at times but is often a significant loss of board control
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
While it compares poorly to all-star land cycles like the Shock Lands, this is still a fantastic piece of fixing
White life gain comes primarily in the flavor of either healing or lifelink, both of which are present in Foundations