Ceaseless Searblades and Lavaclaw Reaches on the battlefield.
({1} magic symbol) ({B} magic symbol) .
({R} magic symbol) available.
Steps
Activate Lavaclaw Reaches's last ability by paying ({1} magic symbol) ({B} magic symbol) ({R} magic symbol) , causing it to become a 2/2 Elemental creature with a new ability until end of turn.
Activate that new ability by paying ({0} magic symbol) .
Ceaseless Searblades triggers, getting +1/+0 until end of turn.
Resolve Lavaclaw Reaches's ability, having no effect.
Repeat from step 2.
Results
Infinitely powerful Ceaseless Searblades until end of turn.