Arthur Dent, Traveler

+1: You get a towel counter. Target creature gets +1/+1.
-2: Arthur Dent, Traveler becomes a 3/3 white, green and blue with X +1/+1 counters on him equal to the number of towel counters you control
-7: Draw X cards and put X +1/+1 counters on any number of target creatures you control where X equals the number of towel counters you control