Oko, Thief of Crowns (Borderless) [Throne of Eldraine] Prismatic Secret Rare you can Special Summon this

you can Special Summon this card from your hand and end the Battle Phase

Increase the ATK of this card by 300 points for each card in your Graveyard that includes "Elementl Hero" in its card name

Set: World Championship Decks 1999 Type: Land — Rarity: Uncommon {T}: Add {C}

This card cannot be Special Summoned except by the effect of "Horus the Black Dragon LV6"

Oko, Thief of Crowns (Borderless) [Throne of Eldraine] Prismatic Secret Rare you can Special Summon thisSet: Throne of Eldraine Type: Legendary Planeswalker Oko Rarity: Mythic Cost: {1}{G}{U} +2: Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.") +1: Target artifact or creature loses all abilities and becomes a green Elk creature with base power and toughness 3 3. 5: Exchange control of target artifact or creature you control and target creature an opponent controls with power 3 or less.