Activate Bartolomé del Presidio by sacrificing Sun Titan.
When Sun Titan dies, Changing Loyalty triggers, returning Sun Titan from your graveyard to the battlefield.
When Sun Titan enters, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Sun Titan.
Resolve the Bartolomé del Presidio ability.
Repeat.

Infinite +1/+1 counters on a creature

Infinite creature ETB

Infinite creature LTB

Infinite death triggers

Infinite creature sacrifice triggers

Sun Titan

Bartolomé del Presidio

Changing Loyalty

Activate Bartolomé del Presidio by sacrificing Brotherhood Outcast.
When Brotherhood Outcast dies, Changing Loyalty triggers, returning Brotherhood Outcast from your graveyard to the battlefield.
When Brotherhood Outcast enters the battlefield, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Brotherhood Outcast.
Resolve the Bartolomé del Presidio ability.
Repeat.

Brotherhood Outcast

Activate Bartolomé del Presidio by sacrificing Danitha
When Danitha dies, Changing Loyalty triggers, returning Danitha from your graveyard to the battlefield tapped.
When Danitha enters the battlefield, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Danitha.
Resolve the Bartolomé del Presidio ability.
Repeat.

Danitha, Benalia's Hope

Activate Bartolomé del Presidio by sacrificing Shepherd of the Cosmos.
When Shepherd of the Cosmos dies, Changing Loyalty triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Shepherd of the Cosmos.
Resolve the Bartolomé del Presidio ability
Repeat.

Shepherd of the Cosmos

Activate Bartolomé del Presidio by sacrificing Boonweaver Giant
When Boonweaver Giant dies, Changing Loyalty triggers, returning Boonweaver Giant from your graveyard to the battlefield
When Boonweaver Giant enters, it triggers, returning Changing Loyalty from your graveyard to the battlefield attached to Boonweaver Giant.
Resolve the Bartolomé del Presidio ability from step 1.
Repeat.

Combos with "Changing Loyalty"