Kobold Slaves

Defender
When Kobold Slaves enters the battlefield, put 2
slave counters on Kobold Slaves. Kobold Slaves' toughness is equal to the number of slave counters on Kobold Slaves. When Kobold Slaves would take damage, remove that many slave counters instead.
At the beginning of your upkeep, double the
number of slave counters on Kobold Slaves.