Riptide Chronologist [Onslaught] Arena League 2000 Set: Commander's Arsenal Type: Enchantment

Set: Commander's Arsenal Type: Enchantment Rarity: Rare Cost: {1}{G} At the beginning of your draw step

Set: Urza's Saga Type: Artifact Rarity: Rare Cost: {4} At the beginning of each player's upkeep

That creature doesn't untap during its controller's untap step for as long as you control Icefall Regent

Golgari Type: Basic Land — Island Rarity: Common ({T}: Add {U}

{4}: Put a +1/+1 counter on Walking Ballista

Riptide Chronologist [Onslaught] Arena League 2000 Set: Commander's Arsenal Type: EnchantmentSet: Onslaught Type: Creature Human Wizard Rarity: Uncommon Cost: {3}{U}{U} {U}, Sacrifice Riptide Chronologist: Untap all creatures of the creature type of your choice. The wizard consulted the Riptide Project about how to further his research. He wasn't prepared for what they told him.