If you somehow control Hollowmurk Siege and no choice was made for it (perhaps because another permanent on the battlefield became a copy of it), it has neither of the two abilities.
2025-04-04
An ability that triggers when counters are put on a permanent will trigger if that permanent somehow enters the battlefield with those counters.
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.
