That text is probably too long. As a rule of thumb, I compare things to Spoils of the Vault, which is nearly as full as a card can get.
Name a card. Reveal cards from the top of your library until you reveal the named card, then put that card into your hand. Remove all other cards revealed this way from the game, and you lose 1 life for each of the removed cards.
Or, if you prefer to use smaller print, consider Ink-Eyes, Servant of Oni.
Ninjutsu


{B}
(
{B}, Return an unblocked attacker you control to hand: Put this card into play from your hand tapped and attacking.)Whenever Ink-Eyes, Servant of Oni deals combat damage to a player, you may put target creature card from that player’s graveyard into play under your control.


: Regenerate Ink-Eyes.
Now, look at the length of your card:
If a creature would deal combat damage to a player, instead prevent that damage and put a number of Y counters on it equal to the damage prevented this way.
Creatures with Y counters don't untap during their controller's untap step.
At the beginning of each player's combat step, each player removes all Y counters from creatures they control and deals that much damage to target opponent.
When Jelloscape leaves play, remove all Y counters from all creatures.