The -3 lets you destroy a target creature, and finally, the -6 gives you an emblem that states "whenever you gain life, target opponent loses that much life." Given that this card only costs four mana to cas t, it, like most of Witherbloom, is quite finely balanced and should see plenty of play across Standard and Commander
For traders, it is also one of the easiest formats for quick conversations and spontaneous deals, especially at a first-year show where many attendees may be eager to meet others in the local scene
Then this thing will shut down all attacks that would kill it since it's a huge rattlesnake to things like Shivan Dragon
These cards, as explained above, have unique effects that can sway the game in your favor if played at the right time or against the right opponents
Not only does it tap for mana, but you can untap it by putting a -1/-1 counter on it
Use of target removal