This black cleric is also a very popular aristocrat and mono-black commander since its a free sacrifice outlet and a sure inclusion in -1/-1 counters decks
Because once that first Island hits the table, everyone else is going to make assumptions anyway.
As you might have seen with Grenzo and Rusko, the best Alchemy commanders either create things for free or cast spells for free
Still, we've seen decks make good use of The Mightstone and Weakstone, and Invasion of Ravnica is even more flexible, exiling things like Wedding Announcement, Fable of the Mirror-Breaker, and The Eternal Wanderer along with exiling most creatures
For many, it was an easy decision to just toss in the bin but for others it was a little tougher to pick
Castle Locthwain What makes [c]Castle Locthwain[/c] so good is that its a land card, so you dont have to worry about it clogging your hand when you have more pressing matters to attend to in a game