Spider-Man, Hero Apprentice

Flash, flying, double strike
When Spider-Man blocks, it gets -1/+1 until end of turn. When it attacks, it gets +1/-1 until end of turn.
When Spider-Man enters the battlefield, put three time counters on it. At the beginning of your upkeep, remove a time counter. When Spider-Man has no time counters on it, return it to your hand.