Yannik, Scavenging Sentinel | Lumbering Battlement | Felidar Guardian

Cards

Lumbering Battlement in hand.
Felidar Guardian on the battlefield.
Yannik in hand or in the command zone.
({6} magic symbol) ({G} magic symbol) ({W} magic symbol) ({W} magic symbol) plus enough mana to pay for commander tax, if applicable available.

Cast
Yannik either from your hand or from the command zone by paying ({2} magic symbol) ({G} magic symbol) ({W} magic symbol) plus commander tax, if applicable.
Yannik enters the battlefield, exiling
Felidar Guardian and putting a +1/+1 counter on any other creature you control.
Cast
Lumbering Battlement by paying ({4} magic symbol) ({W} magic symbol) .
Lumbering Battlement enters the battlefield, exiling
Yannik.
Yannik leaves the battlefield, returning
Felidar Guardian from exile to the battlefield.
Felidar Guardian enters the battlefield, blinking
Lumbering Battlement.
Lumbering Battlement leaves and enters the battlefield, returning
Yannik from exile to the battlefield, and triggering
Lumbering Battlement's enters-the-battlefield ability.
Yannik enters the battlefield, exiling
Felidar Guardian and putting a +1/+1 counter on any other creature you control.
Resolve the
Lumbering Battlement trigger, exiling
Yannik.
Repeat from step 5.