Accesscode Talker

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When Accesscode Talker enters the battlefield,you may exile a card from your graveyard.If a creature card was exiled in this way,put a number of +1/+1 counters equal to exiled creature's power on this creature.
{t}:Accesscode Talker deals damage equal to its power to target creature or planeswalker.The damage can't be prevented.
{c} ,exile a colorless creature from your graveyard:untap Accesscode Talker.