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His ability blocks actions, full stop

His Ancient Skills ability is mostly irrelevant right now, but could see some niche uses at some point down the road

Assuming you have a legendary creature already in play, like Ragavan, Nimble Pilferer, it then returns to the battlefield immediately attacking as though it had haste

This version of box-toppers was repeated to celebrate the release of Ninth Edition but had a smaller selection of cards available to collect.

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As a result, this should likely be avoided right to the very end