When I Grow Up

When you play this card, attach to a creature you
control with power 2 or less.
Attached creature gains +3/+3 and Trample.
At the start of each players' turn, flip a coin.
On heads, gain 3 life. On tails, attached creature
loses all bonuses from this card until end of turn.
"When I grow up, I will eat sweets
every day, on the way to work, and I
will go to bed late every night"
- Matilda, the Musical