When you cast the spell, you pay an amount of mana according to which tier you would like to cast the spell at
Renew gives black, green, and blue Sultai clan cards an ability to pay mana to exile the card from the graveyard and in return puts counters on creatures or even some additional effect counters, creature copies or abilities such as lifelink, flying or deathtouch
I spoke the other week about how its possible to put together a bunch of different Kassandra lines that result in a kill on Turn 3-5, and a player kill that early tends to rub people up the wrong way, even if they know whats potentially coming
Skullport Merchant Skullport Merchant was a mythic uncommon in Forgotten Realms, so its no surprise to see it excelling once again
Two mana to activate goes some of the way to keeping it more balanced, but its still a monster of a card in all sorts of decks