Hollowmurk Siege (Borderless) (TDM-387) - Tarkir: Dragonstorm: (enchantment) (Borderless)

As this enchantment enters, choose Sultai or Abzan.
• Sultai — Whenever a counter is put on a creature you control, draw a card. This ability triggers only once each turn.
• Abzan — Whenever you attack, put a +1/+1 counter on target attacking creature. It gains menace until end of turn.