In the vast majority of games, the life that your opponent gains from you nuking their creatures with Swords to Plowshares will not amount to much, unless theyre playing a black deck with life-to-resource cards (watch out for Toxic Deluge or worse, Yawgmoths Bargain !) Swords to Plowshares isnt a particularly expensive card, and its very easy to find
Players are getting very confused on how it works, though (it makes the creature bigger and then returns it if it dies
Theyre creatures that get stronger whenever you play a land card (think of land like the gas that powers your decks engine) and have incredible synergy with other card types, leading to a deck that will overwhelm your opponent
There's a reason both of those cards are no longer legal in Modern
And then I started using the tool
This is an incredibly useful card to use early when there aren't many cards in the player's graveyard, so they can increase the chances they get what they want