Of course, there are plenty of other alternatives in standard and in white color, but the indestructible ability makes it very appealing between its cost and the fact that you can easily sacrifice two token creatures that you've just created with Mondrak
Crystals The full colored cycle of Crystals reduce costs, and each one has a static ability and an activated ability, so the 4 mana value slot is a key one to launch you into the the biggest and strongest cards, and rely on 2-mana rocks to curve into these on turn 3
Ajani Steadfast Ajani, the Greathearted Bioessence Hydra Brokers Ascendancy Chandra, Acolyte of Flame Chandra, Legacy of Fire Commodore Guff Dark Intimations Dovin, Grand Arbiter Elspeth Conquers Death Forge of Heroes Garruk, Cursed Huntsman Garruk, Unleashed Gatewatch Beacon Gideon's Company Gideon, Champion of Justice Grist, the Hunger Tide Heart of Kiran Huatli, Radiant Champion Jace's Projection Jeska, Thrice Reborn Kaito, Cunning Infiltrator Liliana's Scrounger Lolth, Spider Queen Mila, Crafty Companion Nissa of Shadowed Boughs Oath of Gideon Ral, Crackling Wit Ral, Leyline Prodigy Semester's End Spark Double Spark Double Teferi's Talent Teferi, Temporal Pilgrim Tezzeret, Cruel Captain Vivien's Talent
We knew pearls could be pretty valuable, but this is something else
We recognized that we'd be making more tokens as time went on and knew tokens were popular in Unglued and Magic Player Reward programs, so we added them to boosters
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