Daxos casts their spells

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) You may choose not to untap this artifact during your untap step. , : All creatures get +2/+2 for as long as this artifact remains tapped.

: Untap target artifact.

Daxos can't be blocked by creatures with power 3 or greater. Whenever Daxos deals combat damage to a player, exile the top card of that player's library. You gain life equal to that card's mana value. Until end of turn, you may cast that card and you may spend mana as though it were mana of any color to cast that spell.