An opponent has an instant and/or sorcery in their graveyard.
({4} magic symbol) available.
Steps
Activate The Chain Veil by paying ({4} magic symbol) and tapping it, allowing an additional activation of each of your planeswalkers' loyalty abilities this turn.
Activate Tasha's first loyalty ability by putting a loyalty counter on it, causing you to draw a card and exile an instant and/or sorcery card from an opponent's graveyard with a page counter on it.
Activate Tasha's second loyalty ability by removing three loyalty counters from it, casting an instant or sorcery spell with a page counter on it from exile.
Displacer Kitten and Tasha trigger.
Resolve the Tasha trigger, creating a 3/3 Demon creature token.
Resolve the Displacer Kitten trigger, blinking Tasha.
Resolve the instant or sorcery spell.
Repeat from step 2.
Note that you must abide by targeting restrictions when casting the instant or sorcery spell, and so not all instants and/or sorceries in your opponent' graveyards may work for this combo.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite casts of instants and sorceries in your opponents' graveyards.