[
    new MagicWhenOtherSpellIsCastTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicCardOnStack spell) {
            return (permanent.isFriend(spell) &&
                    spell.getCardDefinition().isArtifact()) ?
                new MagicEvent(
                    permanent,
                    new MagicMayChoice(
                        new MagicPayManaCostChoice(MagicManaCost.create("{1}"))
                    ),
                    this,
                    "PN may\$ pay {1}\$. If you do, you gain 3 life."
                ):
                MagicEvent.NONE;
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            if (event.isYes()) {
                game.doAction(new MagicChangeLifeAction(event.getPlayer(),3));
            }
        }
    }
]