Once cast, the controller searches their library for a creature with a mana value of X or less, which then enters the battlefield
Biting-Palm Ninjas ninjutsu should help to get it to trigger its look at hand ability at least once
Looking at the Magic Online data, the win rate (how often the deck wins matches) of High Tide hasn't been anything noteworthy, sitting at just about 50% (for reference, the current top archetype by win rate among the several most played decks is Faeries, sitting at just below 55%), with some matchups that are some of the lowest win rates I've ever seen for an archetype in any format
Its a [mtg_card]Serra Sphinx[/mtg_card] that you dont have to give up a whole slot for
It was less than a year old when the Commander 2013 decks came out, and copies were everywhere
Pre-order today so that your package arrives precisely when it means to