Tenuous Truce

薄冰休战 (Tenuous Truce) (zhs)

Enchantment - Aura (CMC 2)
Enchant opponent
At the beginning of enchanted opponent's end step, you and that player each draw a card.
When you attack enchanted opponent or a planeswalker they control or when they attack you or a planeswalker you control, sacrifice Tenuous Truce.