Being able to ramp the best land out of the top four cards of your deck at instant speed is already very useful, but the fact that you can still draw one of them into your hand as a fall back means that you wont have a major downside (see Growth Spiral for a similar effect)
Since Energy cards are mostly card art, the holo bubbles cover the entire card
Dark Gengar #6Holo Rare $1051.50 Unown [H] #28Rare $26.04 Unown [P] #58Uncommon $3.88 Light Dragonair #22Rare $39.76 Dark Haunter #36Uncommon $18.28 Light Dragonite #14Holo Rare $387.67 Light Lanturn #23Rare $6.40 Light Jolteon #48Uncommon $76.16 Dark Scizor #9Holo Rare $186.24 Light Ledian #24Rare $17.42 Dark Pupitar - 040/109 #40Uncommon $1.85 Dark Pupitar - 041/109 #41Uncommon $11.22 Dark Pupitar - 2005 (Takashi Yoneda) #41Uncommon $6.89 Pupitar #56Uncommon $9.45 Pupitar #45Uncommon $0.94 Pupitar #90Uncommon $3.56 Pupitar #9Uncommon $12.92 Pupitar #70Common $0.35 Pupitar #58Common $0.35 Pupitar #59Uncommon $0.37
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If you want to go the creature route, Metalwork Colossus, Phyrexian Triniform, Platinum Emperion, and Inkwell Leviathan are all top-notch powerhouses that Sharuum can drop on the field to establish an instant board presence