Unclaimed BirdHow it works & interactions with other cards

A Tale of Two Factions

Unclaimed Bird has a modal-like triggered ability that checks your team affiliation upon entry. If you are on the Mirran team, you act as a counter-remover, stripping away one of every type of counter from any number of permanents. If you are on the Phyrexian team, you proliferate, which allows you to choose any number of players and/or permanents and add another counter of a kind already there.

Step-by-Step Resolution

First, Unclaimed Bird enters the battlefield, putting its ability on the stack. When the ability resolves, it checks your team status. If you are Mirran, you choose your targets; note that you can choose zero permanents or all of them. For each chosen permanent, you remove one counter of every distinct type (e.g., if a creature has two +1/+1 counters and a flying counter, it loses one +1/+1 and the flying counter). If you are Phyrexian, you simply perform the proliferate keyword action.

Strategic Considerations

Common mistakes include forgetting that the Mirran ability affects 'any number' of permanents, which can include your opponents' threats or your own negative counters. Unlike Proliferate, which adds to existing counters, the Mirran effect is a powerful way to reset Sagas, remove Poison counters from players (if the effect allows targeting players in specific variants), or strip Shield counters from enemies. Note that Unclaimed Bird itself is a 2/2 flyer, making it a relevant body even after the trigger.

Interaction examples

Doubling Down with the Throne

Roaming Throne

If you have Roaming Throne on the battlefield with 'Bird' chosen as the type, Unclaimed Bird's ability triggers twice. If you are on the Phyrexian team, you will proliferate twice. If you are on the Mirran team, you can choose two sets of permanents to strip counters from, effectively removing two counters of each kind from those permanents.

Resource Management

Solemn Simulacrum

If you are playing a Mirran strategy, you can use Unclaimed Bird to remove a counter from an opponent's creature that might be preventing your Solemn Simulacrum from safely blocking. Alternatively, if you are Phyrexian and have a way to put a +1/+1 counter on Solemn Simulacrum, Unclaimed Bird can proliferate that counter to make your Golem a more formidable attacker.