Ranked seasons reset monthly, and your new rank depends on where you finished the previous season
For seven life, Griselbrand lets you draw seven cards, refilling your hand and probably causing you to discard cards at the end of your turn to put another reanimation target into your bin
We also saw [casthaven]Darksteel Citadel[/casthaven], a land which can produce multiple mana when a player has cards with affinity for artifacts
Tiana, Celebrating Princess ability stops your opponents from playing actions while your hand is empty, pairing well with cards such as Cinderella, Knight in Training and The Huntsman, Reluctant Enforcer who provide ways to draw and discard cards, refining your hand to find exactly what you need
You need to operate at sorcery speed for this to be effective