- Collect 15 different tokens

Aggressive Mammoth Akroma's Memorial Altar of the Goyf Archetype of Aggression Arlinn, Embraced by the Moon Avatar Kyoshi Badgermole Bloodcrusher of Khorne Brawn Case of the Trampled Garden Centaur Chieftain Chronicle of Victory Domri Rade Ellywick Tumblestrum Embodiment of Fury Emil, Vastlands Roamer Ferocity of the Wilds Frostcliff Siege Full Moon's Rise Garruk's Uprising Garruk, Cursed Huntsman Giant Ankheg Gimbal, Gremlin Prodigy Groundshaker Sliver Gruul War Plow Jetmir, Nexus of Revels Kamahl, Heart of Krosa Khenra Charioteer Kobold Drill Sergeant Kodama of the West Tree Krang, Utrom Warlord Leonardo, the Balance Maul Splicer Maze Behemoth Neck Breaker Nev, the Practical Dean Nylea's Forerunner Nylea, God of the Hunt Old One Eye Orcish Siegemaster Overrun Overwhelming Stampede Paragon of Eternal Wilds Pathbreaker Wurm Pheres-Band Warchief Primal Rage Proud Wildbonder Rageblood Shaman Red XIII, Proud Warrior Roar of the Fifth People Roughshod Mentor Sabertooth Outrider Sphere Grid Stampeding Elk Herd Street Riot Sunrise Sovereign Surrak Dragonclaw Surrak and Goreclaw Tanazir Quandrix Temperamental Oozewagg The Very Soil Shall Shake Thornfist Striker Thunderfoot Baloth Towashi Training Regimen Ulvenwald Behemoth Vivien Reid Yuna, Hope of Spira

Instant speed is where you want to be with this type of effect since you can respond to someone casting Doom Blade on one of your creatures
is a great example, though that comparison might not be fair given the rarity and price difference between the cards