Ratadrabik of Urborg + Sarkhan, the Dragonspeaker + Woe Strider

Ratadrabik of Urborg

Sarkhan, the Dragonspeaker

Woe Strider

How it works

1. Activate Sarkhan's first loyalty ability by putting a loyalty counter on it, causing it to become a legendary 4/4 Dragon creature with flying, indestructible and haste.
2. Activate Woe Strider by sacrificing Sarkhan.
3. When Sarkhan dies, Ratadrabik triggers, creating a token copy of Sarkhan that isn't legendary.
4. Resolve the Woe Strider ability.
5. Repeat using the Sarkhan token.

This loop turns the legendary Planeswalker Sarkhan, the Dragonspeaker into a self-replicating engine by animating him into a creature so he can be fed to Woe Strider. Ordinarily, the legend rule would stop you from keeping a copy, but Ratadrabik of Urborg steps in to bypass this restriction entirely: whenever a legendary creature you control dies, Ratadrabik creates a nonlegendary copy of it that is also a Zombie. Because Woe Strider lets you sacrifice that freshly minted Sarkhan copy at will for infinite scry triggers, leaves-the-battlefield events, and creature deaths, Ratadrabik's replacement token generation immediately triggers all over again with the next iteration.