Quicksilver Elemental [Mirrodin] Giant Coward Set: Phyrexia: All Will Be

Set: Phyrexia: All Will Be One Type: Instant Rarity: Uncommon Cost: {X}{G} Target creature you control gets +X/+X and gains hexproof and indestructible until end of turn

Set: Core Set 2019 Type: Creature — Sphinx Rarity: Uncommon Cost: {5}{U} Flying

but as what they will become

Set: Dominaria United Type: Creature — Phyrexian Kavu Rarity: Rare Cost: {2}{R}{R} First strike

If you control a Kithkin

Quicksilver Elemental [Mirrodin] Giant Coward Set: Phyrexia: All Will BeSet: Mirrodin Type: Creature Elemental Rarity: Rare Cost: {3}{U}{U} {U}: Quicksilver Elemental gains all activated abilities of target creature until end of turn. (If any of the abilities use that creature's name, use this creature's name instead.) You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities.