Oathshame

Exile up to 9 creatures your opponents control, then choose one creature under your control
as the "emisary". Put a -2/+5 counter on the emisary. The emisary can't attack, doesn't tap,
and blocks in each turn if able. Whenever you take damage, prevent it and deal
that much damage to your emisary instead. When this enchantment or your emisary leaves the battlefield return your emisary under your control with a stun counter on it.