616.1.
If two or more replacement and/or prevention effects are attempting to modify the way an event
affects an object or player, the affected object‘s controller (or its owner if it has no controller) or the
affected player chooses one to apply, following the steps listed below. If two or more players have
to make these choices at the same time, choices are made in APNAP order (see rule 101.4).
616.1a
If any of the replacement and/or prevention effects are self-replacement effects (see rule
614.15), one of them must be chosen. If not, proceed to rule 616.1b.
616.1b
If any of the replacement and/or prevention effects would modify under whose control an
object would enter the battlefield, one of them must be chosen. If not, proceed to rule 616.1c.
616.1c
If any of the replacement and/or prevention effects would cause an object to become a copy
of another object as it enters the battlefield, one of them must be chosen. If not, proceed to rule
616.1d
.
616.1d
Any of the applicable replacement and/or prevention effects may be chosen.
616.1e
Once the chosen effect has been applied, this process is repeated (taking into account only
replacement or prevention effects that would now be applicable) until there are no more left to
apply.
Example: Two permanents are on the battlefield. One is an enchantment that reads “If a
card would be put into a graveyard from anywhere, instead exile it,” and the other is a
creature that reads “If [this creature] would be put into a graveyard from the battlefield,
instead shuffle it into its owner?s library.” If the creature is destroyed, its controller
decides which replacement to apply first; the other does nothing.
Example: Essence of the Wild reads “Creatures you control enter the battlefield as a
copy of Essence of the Wild.” A player who controls Essence of the Wild casts Rusted
Sentinel, which normally enters the battlefield tapped. As it enters the battlefield, the
copy effect from Essence of the Wild is applied first. As a result, it no longer has the
ability that causes it to enter the battlefield tapped. Rusted Sentinel will enter the
battlefield as an untapped copy of Essence of the Wild.
616.2.
A replacement or prevention effect can become applicable to an event as the result of another
replacement or prevention effect that modifies the event.
Example: One effect reads “If you would gain life, draw that many cards instead,” and
another reads “If you would draw a card, return a card from your graveyard to your hand
instead.” Both effects combine (regardless of the order they came into existence): Instead of
gaining 1 life, the player puts a card from his or her graveyard into his or her hand.