Foundations Jumpstart

Legendary Creature — Elf Druid

Elves you control have "Whenever this creature becomes tapped during your turn, untap it and put a +1/+1 counter on it. This ability triggers only once each turn."

Dionus, Elvish Archdruid

Legendary Creature — Human Wizard

Flash (You may cast this spell any time you could cast an instant.)
When Venser enters, return target spell or permanent to its owner's hand.

Venser, Shaper Savant

Wilds of Eldraine: Enchanting Tales

Enchantment

Whenever a creature you control dies, each other player sacrifices a creature of their choice.

Grave Pact

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.