Sacrifice after III.) I, II Jecht Beam Each opponent discards a card and you draw a card
The app doesn't really teach you how to make a deck of your own, for starters
Example: Leyline of the Void is an enchantment that reads, in part, If a card would be put into an opponents graveyard from anywhere, exile it instead." Wheel of Sun and Moon is an Aura with enchant player and the ability If a card would be put into enchanted players graveyard from anywhere, instead that card is revealed and put on the bottom of its owners library." If the controller of Chittering Host is affected by both cards effects, that player chooses one effect to apply to the event and Midnight Scavengers and Graf Rats are both moved to the appropriate zone
Even if the convoke card is an instant, you cannot tap a creature to pay for the cards casting cost and use any other ability that requires tapping
Tempered Steel was a Standard/Modern staple, and this card has the potential
You can even find a surge foil version of a showcase Ring treatment card, borderless rare or mythic rare land, or new Scene Box borderless scene card