You may exert Watchful Naga as it attacks. When you do, draw a card. (An exerted creature won't untap during your next untap step.)
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If one or more -1/-1 counters would be put on a creature you control, that many -1/-1 counters minus one are put on it instead.
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Search your library for up to X basic land cards, where X is the number of tapped creatures you control, and put those cards onto the battlefield t...
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Prepare
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Untap target creature. It gets +2/+2 and gains lifelink until end of turn.