Santa, Lord of Snowgains

When Santa enters the battlefield he gains a +1/+1 counter for each snow permanent in
play. His power and toughness are each equal
to the number of elf permanents in play.
Snowwalk (unblockable if an opponent controls
a snow land)
{s}, {t}: Create a 1/1 red Worker Elf.
{s}{s}{s}, {ut}: Create a 3/3 green Reindeer.