Yannik, Scavenging Sentinel | Leonin Relic-Warder | Oblivion Ring

Cards

Cast
Oblivion Ring by paying ({2} magic symbol) ({W} magic symbol) .
When
Oblivion Ring enters the battlefield, its first ability triggers, exiling
Yannik.
When
Yannik leaves the battlefield,
Leonin Relic-Warder returns to the battlefield from exile.
When
Leonin Relic-Warder enters the battlefield, its first ability triggers, exiling
Oblivion Ring.
When
Oblivion Ring leaves the battlefield, its second ability triggers, returning
Yannik from exile to the battlefield.
When
Yannik enters the battlefield, it triggers, exiling
Leonin Relic-Warder until
Yannik leaves the battlefield and putting two +1/+1 counters on any creature you control.
When
Leonin Relic-Warder leaves the battlefield, its second ability triggers, returning
Oblivion Ring from exile to the battlefield.
Repeat from step 2.