Removal is always useful, and though you give your opponent Ink, you can remove a character from play, and prevent it from going into the discard pile to potentially be brought back
That, or being able to recast all your cards from your graveyard via Yawgmoth's Will
Sword of Hearth and Home Marching closer to the end of the Sword of Protection from Colors cycle, Sword of Hearth and home does what I, and I suspect that lots of my friends, like to do: get additions lands (untapped, by the way), and blinking creatures with great enters-the-battlefield triggers
High risk, high reward: Mega Pokmon are stronger than ever, and they evolve just like regular Pokmon ex, but there is a catch
Some of these are very popular across various formats, like Baleful Strix in Legacy, Fblthp, the Lost in Commander, and Elvish Visionary and Helpful Hunter in Pauper