Steve Rogers, First Avenger

At the beginning comabt on your turn, and the beginning of your endstep, if Steve Rogers, First Avenger has no shield counters, put one onto it.
{1}: Remove a shield counter from Steve Rogers,
First Avenger and choose one—
• Tap target creature, and put a stun counter
onto it.
• Deal 2 damage to target player or planeswalker.