Red Riot, Unbreakable

When Red Riot, Unbreakable is dealt combat damage, you get an experience counter.
Red Riot, Unbreakable has the following effects based on the number of experience counters you have.
1+: Gains +0/+1 for each experience counter you have.
5+: Can block an additional creature per experience counter you have.
7+: Gains Indestructible.
10+: Can block an additional creature per experience counter you have.