Lost Order of Jarkeld [Ice Age] Spell Ruler You can only use each

You can only use each effect of "Infinitrack Harvester" once per turn

Set: EX: Dragon Frontiers Rarity: Rare

You can only use this effect of "Fire Cracker" once per turn

except "Heroic Challenger - Ambush Soldier"

Set: Aquapolis Type: Fire Rarity: Uncommon Retreat cost: Colorless

Lost Order of Jarkeld [Ice Age] Spell Ruler You can only use eachSet: Ice Age Type: Creature Human Knight Rarity: Rare Cost: {2}{W}{W} As Lost Order of Jarkeld enters the battlefield, choose an opponent. Lost Order of Jarkeld's power and toughness are each equal to 1 plus the number of creatures the chosen player controls. "Let us remember brave Jarkeld and his troops, who perished in the Adarkar Wastes so long ago." Halvor Arenson, Kjeldoran Priest