Even the power-hungry sorts who are specifically trying to double the starting loyalty of their planeswalkers can turn to Vorinclex, Monstrous Raider
The most obvious way to tell is if your card is shadowless is if the bottom of the card says 1995, 96, 98, 99 Nintendo Creatures If the card has the year 99 at the bottom, then it is shadowless
It can be argued that these socks could have avoided a bit of the snide comments online had the promo been a bit more interesting while keeping with the pun, like say Wooded FOOThills
R Rare Flame Cerebrus X FIRE Level 6 [ PyroNormal ] ATK 2100 DEF 1800 Known to many as the "Burning Executioner", this monster is capable of burning enemies to cinders
You don't need stuff in hand or stuff in bin, just any old artifact in play and you are good to go with Tinker
If you somehow manage to control two Carths (perhaps because of Spark Double), the cost-changing effect is cumulative