Ekthi, Contaminator Priest + Sword of the Meek + Lithatog
Ekthi, Contaminator Priest
Sword of the Meek
Lithatog
Infinitely large creature until end of turnInfinite artifact ETBInfinite artifact LTBInfinite artifact sacrifice triggers
How it works
Cast Sword of the Meek by paying 2.
When Sword of the Meek enters, its living weapon ability granted to it by Ekthi triggers.
Holding priority, activate Lithatog by sacrificing Sword of the Meek.
Resolve the Sword of the Meek trigger, creating a 0/0 Phyrexian Germ creature token. It'll enter as a 1/1 due to Ekthi's static effect.
When the Phyrexian Germ enters, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Phyrexian Germ.
Repeat from step 2.
This engine transforms the humble Sword of the Meek into an endless cycle of creation and sacrifice, propelled by Ekthi, Contaminator Priest granting every piece of equipment the living weapon ability. As the triggered Germ token enters the battlefield, Ekthi's static pump elevates it to a 1/1, which satisfyingly coaxes the Sword right back from your graveyard to attach itself anew. While this loop is already spinning out endless artifact movement and sacrifices, Lithatog is right there waiting to devour that very same Sword of the Meek for fuel, converting the endless loop into an infinitely large beast until end of turn.