Ratadrabik of Urborg + Boonweaver Giant + In Bolas's Clutches + Altar of Dementia

Ratadrabik of Urborg

Boonweaver Giant

In Bolas's Clutches

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Boonweaver Giant.
2. When Boonweaver Giant dies as a legendary creature due to In Bolas's Clutches, Ratadrabik of Urborg triggers, creating a token copy of Boonweaver Giant that is a 2/2 Zombie in addition to its other types.
3. When the Boonweaver Giant token enters the battlefield, it triggers, returning In Bolas's Clutches from your graveyard to the battlefield attached to the token.
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Boonweaver Giant's power.
5. Repeat.

This fascinating loop turns Boonweaver Giant into an endless mill machine by manipulating legendary status right under Ratadrabik of Urborg's watchful eye. Because In Bolas's Clutches enchants the Giant and makes it legendary, its demise triggers Ratadrabik of Urborg to conjure a non-legendary 2/2 Zombie copy. When that token enters the battlefield, Boonweaver Giant's search ability fetches In Bolas's Clutches right back from the graveyard, re-enchanting the token to restart the cycle. Altar of Dementia capitalizes on this perpetual motion, letting you sacrifice the Giant repeatedly to mill your opponent's entire library.