Hero card

Training Regimen

Enchantment

SpellUsed once: what it does depends on when you cast it

Needs: Valiant

Gives: Counter +1/+1, Enchantment

Not in winning lists yet: read from the card text and the graph

Build a deck with Training Regimen as the hero

Benefits from it

Elvish Archivist · Claim the Kingdom · Strength of Will · Ride the Shoopuf · Three Tree Scribe · Beorn's Hospitality · Dancing from Dark to Dawn · Bristly Bill, Spine Sower

Use instead if you don't have it

World War Hulk · Case of the Trampled Garden · Earthbender Ascension · Valkyrie's Call · Terrasymbiosis · Sothera, the Supervoid

Cards in the meta that answer it

Countersculpt (Azorius Control) · Get Lost (Azorius Control) · Inevitable Defeat (4-Color Control) · No More Lies (Azorius Control)