mtg cards in graveyard magic the gathering - Do creatures from outside the game go to the graveyard? MTG Best Commander Graveyard +1/+1

[15] Weekly rewards Every week, players can earn 250 experience points for the first 15 wins in Standard Play, ranked modes, or events (resetting each Sunday at 9 am UTC)

For example, Kwain, Itinerant Meddler has an activated ability that lets you 'pay the cost' of tapping it

$0.49 Selesnya Sentry Return to Ravnica $0.49 Civic Stalwart Ravnica Allegiance $0.35 Wild Elephant Mirage $0.49 Loxodon Line Breaker Core Set 2019 $0.35 Glacial Wall 5th Edition $0.49 Elephant Guide Eternal Masters $0.59 Crazed Armodon Tempest $0.35 War Mammoth 4th Edition $0.35 Wall of Air 4th Edition $0.49 Loxodon Wayfarer Scars of Mirrodin $3.99 Elephant Grass Visions $0.49 Loxodon Battle Priest Tarkir: Dragonstorm 0 results found

I could not ask for a warmer welcome