Infinite self-discard triggers, Infinite +1/+1 counters on a creature
Put a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning an artifact or creature card from your graveyard to your hand.
Thran Vigil triggers. Holding priority, activate Prognostic Sphinx by discarding an artifact or creature card.
Resolve the Thran Vigil ability, putting a +1/+1 counter on Evolution Witness.
Repeat from step 2.
Component Cards
How It Works
Put a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning an artifact or creature card from your graveyard to your hand.
Thran Vigil triggers
Holding priority, activate Prognostic Sphinx by discarding an artifact or creature card.
Resolve the Thran Vigil ability, putting a +1/+1 counter on Evolution Witness.
Repeat from step 2.