Beirani, Flute of Summoning

{2}, {t}: Put a charge counter on Beirani, Flute of Summoning.
{t}, Remove a charge counter from Beirani:
Choose one:
-Search your library for a creature card, reveal it,
put it into your hand, then shuffle your library.
-Put a creature card from your hand onto the battlefield.
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A tune can call forth any creature to serve its player.