Yes, you can activate abilities and cast instants during your upkeep. However, you seem to be confused about the distinction between the untap step and upkeep. The untap step precedes the upkeep.
Which comes first untap or upkeep?
b. Upkeep Step – This happens directly after untap and is the first time players may take action during a turn. Abilities that trigger at the beginning of upkeep go on the stack, and then players can play instants and abilities.
Can you play Sorceries during your upkeep?
No, you can’t do what you’re trying to do, unfortunately! Yes, however, in general you can cast instants before a “beginning of your upkeep” triggered ability resolves. You cannot, however, do it before that ability gets triggered and goes on the stack, which is what messes up your plan.
Can you respond to untap?
The untap step is like mana abilities, you can’t respond to mana abilities, and you can’t respond to anything in the untap step.
Can you respond before upkeep?
Yes you can respond to “at the beginning of your upkeep” triggers, but no this doesnt work the way you state because all of the “at the beginning of your upkeep” triggers get put on the stack at the same time and then can be responded to.
What happens when you untap a creature in magic?
Untap target creature. It gets +2/+2 until end of turn. If this spell was kicked, that creature gets +4/+4 until end of turn instead. Each creature you control assigns combat damage equal to its toughness rather than its power. Creatures you control can attack as though they didn’t have defender.
When does untap target creature gain control of it?
Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn. If was spent to cast this spell, the creature gains “Whenever this creature deals combat damage, you gain that much life” until end of turn. Fyndhorn Brownie (3)
When does chakram Slinger untap a target creature?
Partner with Chakram Slinger (When this creature enters the battlefield, target player may put Chakram Slinger into their hand from their library, then shuffle.) Whenever you cast a spell during your turn, untap target creature. : Untap target creature. Activate this ability only if you control a Gideon planeswalker.
When does bounding Krasis untap a target creature?
Flash (You may cast this spell any time you could cast an instant.) When Bounding Krasis enters the battlefield, you may tap or untap target creature. You may pay rather than pay this spell’s mana cost. At the beginning of your upkeep, you may untap target creature and gain control of it until end of turn.
