There are currently three kinds of Lorcana cards in the TCG: Characters - used for challenges and quests, and often feature unique abilities Items - stay on the board and offer special effects Actions - a one-off card that activates a special advantage and then gets discarded Actions also have one sub-type that's worth being aware of - Songs
This Shiva Enchantment creature Saga elemental Magic: the Gathering card could benefit a control or tempo deck that focuses on tapping and disabling opponent's creatures while drawing cards to maintain card advantage
So far, these statistics have come from very small sample sizes, so more information on the odds of the rarities will be better understood after Disney Lorcana is available to the public later this month
At the beginning of your upkeep, it becomes night if you control three or more Werewolves
It also helps that it readies them to prevent any crackback from your opponents in challenges
Aside from categories like instant, creature, and planeswalker, cards in Magic: The Gathering can fulfill specific roles like spot removal, utility lands, and certainly board wipes