Swarm Shambler
Creature — Fungus Beast
This creature enters with a +1/+1 counter on it.
Whenever a creature you control with a +1/+1 counter on it becomes the target of a spell an opponent controls, create a 1/1 green Insect creature token.
, 
: Put a +1/+1 counter on this creature.
Nicholas Gregory
Zendikar Rising Promos (PZNR)
• #207pRulings
If a spell targets a creature you control with a +1/+1 counter on it more than once, Swarm Shambler’s ability triggers only once.
(wotc • 2020-09-25)
An ability that triggers when a creature becomes the target of a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
(wotc • 2020-09-25)
You create just one Insect token, no matter how many +1/+1 counters the target creature has on it.
(wotc • 2020-09-25)
If a creature without a +1/+1 counter on it becomes the target of a spell an opponent controls, putting a +1/+1 counter on it after that won’t cause Swarm Shambler’s middle ability to trigger.
(wotc • 2020-09-25)
Related Cards
Printings
Rulings
If a spell targets a creature you control with a +1/+1 counter on it more than once, Swarm Shambler’s ability triggers only once.
(wotc • 2020-09-25)
An ability that triggers when a creature becomes the target of a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
(wotc • 2020-09-25)
You create just one Insect token, no matter how many +1/+1 counters the target creature has on it.
(wotc • 2020-09-25)
If a creature without a +1/+1 counter on it becomes the target of a spell an opponent controls, putting a +1/+1 counter on it after that won’t cause Swarm Shambler’s middle ability to trigger.
(wotc • 2020-09-25)