magarena/release/Magarena/scripts/Mentor_of_the_Meek.groovy

[
    new MagicWhenOtherComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicPermanent otherPermanent) {
            return (otherPermanent != permanent &&
                    otherPermanent.isCreature() && 
                    otherPermanent.isFriend(permanent) &&
                    otherPermanent.getPower() <= 2) ?
                new MagicEvent(
                    permanent,
                    new MagicMayChoice(
                        new MagicPayManaCostChoice(MagicManaCost.create("{1}"))
                    ),
                    this,
                    "You may\$ pay {1}\$. If you do, draw a card."
                ):
                MagicEvent.NONE;
        }
        
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            if (event.isYes()) {
                game.doAction(new MagicDrawAction(event.getPlayer()));
            }
        }        
    }
]