Archery Training [Urza's Destiny] Return to Ravnica Set: Duel Decks Anthology Type:

Set: Duel Decks Anthology Type: Creature — Human Wizard Rarity: Common Cost: {U} Counter target spell with mana value 4 or greater

(They deal damage to creatures in the form of -1/-1 counters

It cares more about preserving the herd's territory than about preserving itself

Set: Mercadian Masques Type: Creature — Dinosaur Rarity: Rare Cost: {2}{G}{G} Whenever a player plays a land

If anything refers to your library

Archery Training [Urza's Destiny] Return to Ravnica Set: Duel Decks Anthology Type:Set: Urza's Destiny Type: Enchantment Aura Rarity: Uncommon Cost: {W} Enchant creature At the beginning of your upkeep, you may put an arrow counter on Archery Training. Enchanted creature has "{T}: This creature deals X damage to target attacking or blocking creature, where X is the number of arrow counters on Archery Training."