Tatsunari, Toad Rider [Kamigawa: Neon Dynasty] PW3 you gain life equal to

you gain life equal to that card's mana value

Set: EX: Dragon Type: Water Rarity: Ultra Rare Retreat cost: Colorless

What's the worst that could happen

When Rock Star enters the battlefield

INT 21 (+5)

Tatsunari, Toad Rider [Kamigawa: Neon Dynasty] PW3 you gain life equal toSet: Kamigawa: Neon Dynasty Type: Legendary Creature Human Ninja Rarity: Rare Cost: {2}{B} Whenever you cast an enchantment spell, if you don't control a creature named Keimi, create Keimi, a legendary 3 3 black and green Frog creature token with "Whenever you cast an enchantment spell, each opponent loses 1 life and you gain 1 life." {1}{G U}: Tatsunari, Toad Rider and target Frog you control can't be blocked this turn except by creatures with flying