It gives all of your stuff ward: sacrifice a permanent, nice in things like Treasure-dense decks and overall powerful
And even though you know paying is the right call, the player with Rhystic still ends up drawing a million cards
Then I realized it is a fair 2 mana = 1 damage combo that is instead very difficult to deal with because Burning-Tree Emissary is always safe in the hand, Temur Sabertooth can get indestructible if you always keep 2 mana open and have another creature on the board and Outpost Siege is an enchantment
Purple also takes edicting from black, and then dabbles in enchantment removal and direct damage
Notably, this Selesnya Dino legend can be cheated into play as early as turn one(!) with the three-mana planeswalker Sorin, Imperious Bloodlords -3 ability, because in addition to being a Dino, its also a Vampire