When casting a spell as an Omen, use the alternative characteristics and ignore all of the card's normal characteristics
This can be repeated endlessly as long as Jasper keeps questions on your turn, effectively shutting down a high-lore card until your opponent deals with Jasper
Generally those first two abilities, the draw and the mana production, are all you need to dominate games
Coming down as early as turn 3 with the right draw, it curves us into a turn 4 Herald of Anguish while leaving a 2/2 body besides
Perhaps you're a talented Magic player, or a total novice with nothing else to do on a rainy afternoon in a town where you're just passing through, but either way, if you're going to play, you're going to need the right cards
The tradeoff to this is many Dinosaurs hit very hard, with high power and toughness to make them an immediate threat as soon as they hit the battlefield