Mournwillow
Creature — Plant Skeleton
Haste
Delirium — When Mournwillow enters the battlefield, if there are four or more card types among cards in your graveyard, creatures with power 2 or less can't block this turn.
Legalities
- brawl: banned
- commander: legal
- legacy: legal
- modern: legal
- pauper: legal
- standard: banned
- vintage: legal
- pioneer: legal
Rulings
- 2016-07-13:
Because the last ability’s effect doesn’t change the characteristics of any permanents, the set of creatures affected is constantly updated. Any creature with power 2 or less at the moment blockers are chosen will be unable to block.