Christmas Tree was the first card shown for Beta 39.0 on both Twitter and Facebook.
Christmas Tree is a solid defensive card as a 7G 3/9 Taunt that summons a Gift on both adjacent slots (if available), giving 2 more Taunt monsters, but with 0/2 (and 0G, so they are free to be replayed when bounced). This gives a total of 13 HP combined in Taunt monsters for 7G. However, Christmas Tree is unable to attack.
This makes Christmas Tree work well in both a Disarmed deck with Will and a Taunt deck with Solidity. (Keep in mind that the Gifts aren't affected by Solidity as they are summoned, not played.) It's also a solid addition to a Plant deck, as it's a Plant itself. This allows it to get its Disarmed removed by Gardener Asgore.