Players and artists modify the art on Magic cards directly with paint or ink, but some also use custom foil sleeves to customize their cards
This matters for cards that specifically care about the act of investigating
If this card is sent to the GY as Synchro Material: You can Special Summon 2 "Doppel Tokens" (Warrior/DARK/Level 1/ATK 400/DEF 400) in Attack Position
Artifact Creature: Esper SentinelEsper Sentinel, 425447 Inclusions Artifact Land: Seat of the SynodSeat of the Synod, 144694 Enchantment Creature: Sanctum WeaverSanctum Weaver, 116227 Enchantment Artifact: Whip of ErebosWhip of Erebos, 76481 Kindred Enchantment: Eldrazi ConscriptionEldrazi Conscription, 46704 Kindred Instant: Crib SwapCrib Swap, 35661 Kindred Sorcery: Elvish PromenadeElvish Promenade, 28369 Instant Sorcery: Repudiate // ReplicateRepudiate // Replicate, 11268 Kindred Artifact: Cloak and DaggerCloak and Dagger, 7377 Enchantment Land: Valgavoth's LairValgavoth's Lair, 2842 Yeah, yeah, yeah, Esper SentinelEsper Sentinel is an amazing card that every deck should play
