The ability to kill an opposing five-mana creature for two mana is often a big enough tempo advantage to get ahead of those types of decks and establish control over the game
Personally, I treat individual games of Magic as instances of a longer iterated game that is all the games of Magic I will play, and I think the benefit I could get for dishonesty isnt worth the long term cost, but I know other players who would always break their word if the outcome of a game directly hinges on it, and I even still might trust some of those players in situations where I think the outcome of a game is unlikely to directly hinge on the thing were discussing
To dungeons deep and caverns old
Note that can do both if you reveal both, by the by
The best Constellation cards in Magic: The Gathering , ranked by EDHREC popularity a real-world measure of playability across Commander, Modern, Pioneer, and all formats
I started the game with four lands and a Long-Term Plans in my starting hand, so I carried out my plan of tutoring for Possibility Storm as early as possible and just seeing where things went