Katilda is a two-mana Green and White 1/1 that has protection from werewolves, and also grants all of your human creatures the ability to tap to add one mana of its colors
The reward of damage, lifegain, and card advantage makes this a surprisingly impactful black creature
Cards that can win on resolution: Coalition Victory, Biorhythm, Thassa's Oracle, Bolas's Citadel, Field of the Dead, Panoptic Mirror
You can use it to lock down your opponents' creatures, forcing him to walk into Wrath of God or other mass removal cards
Having a Character at this location can also help setting the scene for Chip, Team Player, a 6-cost character that can quest for 2 every turn and allow the Player to draw a card on play if there is another Character with a Willpower of 4 or more