There are a lot of ways to get good value from this, though its still a heavily situational card even with that support in place
Treat those Core percentages as pre-rotation snapshots: Sets 5-8 left Core Constructed on July 17, the same day as the Set 13 prerelease, so any deck leaning on cards from that block already lost pieces and those shares are shifting as post-rotation tournament data comes in
Holo rares feature shiny holographic foil highlighting the Pokmon, ranging from older to newer cards
The most popular of the bunch appears to be the Black Lotus, which comes as no surprise
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The enters trigger often gives you a nice attack, and a creature with Mobilize is exactly what you want in Mardu