Alpine Meadow Arctic Treeline Breeding Pool Canopy Vista Coastal Peak Contaminated Aquifer Eclipsed Steppe Elegant Parlor Fetid Pools Glacial Floodplain Glittering Massif Godless Shrine Hallowed Fountain Hedge Maze Ice Tunnel Idyllic Beachfront Idyllic Grange Indatha Triome Irrigated Farmland Island Jetmir's Garden Ketria Triome Lush Portico Meticulous Archive Mistveil Plains Molten Tributary Moonring Island Mystic Sanctuary Plains Plateau Prairie Stream Radiant Grove Radiant Summit Raffine's Tower Rain-Slicked Copse Raugrin Triome Rimewood Falls Sacred Foundry Sacred Peaks Savai Triome Savannah Scattered Groves Scorched Geyser Scrubland Shadowy Backstreet Snow-Covered Island Snow-Covered Plains Snowfield Sinkhole Sodden Verdure Spara's Headquarters Steam Vents Sunken Hollow Sunlit Marsh Tangled Islet Temple Garden Thundering Falls Tropical Island Tundra Turbulent Moor Turbulent Springs Turbulent Steppe Turbulent Wilderness Umbral Expanse Undercity Sewers Underground Sea Volatile Fjord Volcanic Island Watery Grave Xander's Lounge Zagoth Triome

Validate their certifications, request factory audit reports if available, and verify their business licenses
A deck built around this card will want to prioritize artifacts, as Knuckles has a unique win condition depending on how many the player controls
Since Animar reduces the cost of creatures by colorless mana, if you get enough counters on it, you can play all of your artifact creatures for free
Zombie decks in particular make good use of amass zombies, and were bound to see more creature types supported in the future
Whenever a nontoken creature you control enters, put a +1/+1 counter on it and draw a card