Tifa, Martial Artist Art Card (Gold-Stamped Planeswalker Symbol) [FINAL FANTASY Art Series] Fourth Edition double the number of +1/+1

double the number of +1/+1 counters on that creature instead

or a weekend convention

You may cast the copies without paying their mana costs

" —Ella Wheeler Wilcox

Whenever you cast an artifact spell

Tifa, Martial Artist Art Card (Gold-Stamped Planeswalker Symbol) [FINAL FANTASY Art Series] Fourth Edition double the number of +1/+1Set: FINAL FANTASY Art Series Type: Instant Rarity: Uncommon Cost: {G} Tiered (Choose one additional cost.) Somersault {0} Target creature gets +2 +2 until end of turn. Meteor Strikes {2} Double target creature's power and toughness until end of turn. Final Heaven {6}{G} Triple target creature's power and toughness until end of turn.