Boon of Tzeentch

Enchant target creature, then flip 4 coins.
Enchanted creature gains the effect of the
numbered buff below corresponding to the
number of heads flipped.
0) -100/-100.
1) +1/+1.
2) +2/+2 and flying.
3) +3/+3, flying, and first strike.
4) +4/+4, flying, and double strike.