Blind FuryHow it works & interactions with other cards

Stripping the Trample

When Blind Fury resolves, it immediately affects all creatures currently on the battlefield, causing them to lose trample until the end of the turn. This is handled in Layer 6 of the continuous effects system. Because it has a specific duration and changes the characteristics of objects, it only applies to creatures that are on the battlefield at the moment the spell resolves. If a creature enters the battlefield later in the turn, or if an effect grants a creature trample after Blind Fury has resolved, that creature will still have trample.

Doubling Combat Damage

The second part of the spell creates a replacement effect that lasts for the rest of the turn. This effect specifically looks for combat damage dealt by a creature to another creature. If such an event would occur, the damage is doubled. Note that this does not affect combat damage dealt to players or planeswalkers. If multiple doubling effects are active, the controller of the creature being dealt damage (the 'affected player') chooses the order in which to apply them.

Strategic Timing

To maximize the loss of trample, you should cast Blind Fury during the Begin Combat step or the Declare Attackers step. This ensures your opponent's creatures cannot trample over your blockers. Because the damage doubling applies to any creature-to-creature combat damage for the entire turn, it also affects First Strike and Double Strike damage steps separately. Be careful, as this effect is symmetrical and applies to your own creatures being hit as well.

Interaction examples

Navigating Chaos

Chaos Warp

If you cast Blind Fury to double damage and your opponent responds with Chaos Warp on your best blocker, the Chaos Warp resolves first. Your creature is shuffled away, and you reveal the top card. If that card is a creature, it enters the battlefield after Blind Fury has already finished its 'lose trample' check. However, if that new creature later deals combat damage to another creature during that same turn, the damage-doubling replacement effect will still apply to it because that effect was set up for the entire turn.

Redirection and Targeting

Deflecting Swat

Blind Fury does not use the word 'target' in its oracle text; it affects 'all creatures' and creates a global replacement effect. If you cast Blind Fury, an opponent cannot use Deflecting Swat to change who it affects, as there are no targets to choose. Even if Deflecting Swat is cast for free using a commander, it would have no valid target within the Blind Fury spell to redirect.