Something as basic as a merchant panel, where a dude shows up every day with new trades offeredwhere the NPC will trade you cards, at different rates
First, it's cheaper - the blue one is the most expensive one
Youll be able to see your opponents hand, choose a card, and tax it, whether they're casting it or using its non-mana activated abilities
While one mana is pretty easy to pay, the ward effect has the potential to keep your creature protected across several turns, or at least tax your opponent so they cant do multiple things in a turn
However, there is one tiny detail about the cards that may have some players claiming Magic 's designers did somewhat tip their hand as to what choice they see as canon
Cackling Counterpart has an edge since it doesnt shrink your creatures, but it costs significantly more mana for both sides than our froggy friend