Magic: The Gathering Comprehensive Rules Changes - Shards of Alara to Conflux

Old rule (Shards of Alara)	New rule (Conflux)
Removed from Combat [Click to view all changes.]
Removed from Combat A creature or planeswalker is removed from combat if it leaves play (such as by being destroyed or removed from the game); if its controller changes; if it stops being a creature or planeswalker, respectively; or if an effect removes it from combat. A creature is also removed from combat if it regenerates (see rule 419.6b). A creature that's removed from combat stops being an attacking, blocking, blocked, and/or unblocked creature. A planeswalker that's removed from combat stops being attacked. A permanent that's removed from combat can't assign combat damage or have combat damage assigned to it. However, if combat damage assigned to or by that permanent is already on the stack, it will resolve normally. See rule 306.4 and rule 310.4a.	Removed from Combat A permanent is removed from combat if it leaves play, if its controller changes, if an effect specifically removes it from combat, if it's a planeswalker that's being attacked and stops being a planeswalker, or if it's an attacking or blocking creature that regenerates (see rule 419.6b) or stops being a creature. A creature that's removed from combat stops being an attacking, blocking, blocked, and/or unblocked creature. A permanent that's removed from combat can't assign combat damage or have combat damage assigned to it. However, if combat damage assigned to or by that permanent is already on the stack, it will resolve normally. A planeswalker that's removed from combat stops being attacked. See rule 306.4 and rule 310.4a.

Old rule (Shards of Alara)

New rule (Conflux)

Removed from Combat [Click to view all changes.]

Removed from Combat

A creature or planeswalker is removed from combat if it leaves play (such as by being destroyed or removed from the game); if its controller changes; if it stops being a creature or planeswalker, respectively; or if an effect removes it from combat. A creature is also removed from combat if it regenerates (see rule 419.6b). A creature that's removed from combat stops being an attacking, blocking, blocked, and/or unblocked creature. A planeswalker that's removed from combat stops being attacked. A permanent that's removed from combat can't assign combat damage or have combat damage assigned to it. However, if combat damage assigned to or by that permanent is already on the stack, it will resolve normally. See rule 306.4 and rule 310.4a.

Removed from Combat

A permanent is removed from combat if it leaves play, if its controller changes, if an effect specifically removes it from combat, if it's a planeswalker that's being attacked and stops being a planeswalker, or if it's an attacking or blocking creature that regenerates (see rule 419.6b) or stops being a creature. A creature that's removed from combat stops being an attacking, blocking, blocked, and/or unblocked creature. A permanent that's removed from combat can't assign combat damage or have combat damage assigned to it. However, if combat damage assigned to or by that permanent is already on the stack, it will resolve normally. A planeswalker that's removed from combat stops being attacked. See rule 306.4 and rule 310.4a.