Dubious Challenge

When Pia Nalaar enters, create a 1/1 colorless Thopter artifact creature token with flying. 1R: Target artifact creature gets +1/+0 until end of turn. 1, Sacrifice an artifact: Target creature can't block this turn.

Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's mana value. 3UU, Exile this enchantment: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.

This land enters tapped unless you control two or fewer other lands. T: Add B or G.

This land enters tapped unless you control two or fewer other lands. T: Add U or R.

Destroy all creatures. You gain 1 life for each creature destroyed this way.

This land enters tapped unless you control two or fewer other lands. T: Add R or W.

Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.) At the beginning of your upkeep, if you control the artifact with the greatest mana value or tied for the greatest mana value, draw a card.

When this creature enters, you get EEE (three energy counters). Pay EEE: Put a +1/+1 counter on this creature. It gains hexproof until end of turn.