THE COMBO
at least two creatures on board.
at least one other card that will make tokens when you cast your sig spell.
That is the board state that you are trying to achieve with that board state, you can cast battle hymn an infinite number of times, allowing for some fun times. When you cast battle hymn for the first time with this board state, on cast, you get two triggers, one from saheeli, and one from the other token maker, that each make a token. because of this, battle hymn gives you four mana when it resolves. with that four mana, you can then recast battle hymn, getting two tokens, and six mana. and so on, and so forth. then you can win with infinite tokens, cast triggers, or mana.
THE EARLY GAME
in the early game, you want to keep any hand that has at least one win con or token maker. don't mulligan too much, you still need your digging cards. then, you dig through your deck as deep as possible, looking for the combo piece thta you should still need. this is when you play saheeli and any other support creatures to also work as blockers to keep her alive. try to stay under the radar, so people won't try to kill saheeli.
THE MID-GAME
Try your best to continue digging through your library and protecting saheeli. start considering how much mana you need to pull of the combo, and whether you need to cast your win condition card before or after the combo happens. this is the stage where careful planning and impeccable use of mana is essential to succeeding. if necessary, you can cast your sig spell oncce to get some mana, and to convince other players that there's no combo with it. this will make the combo more mana-intensive to start later on though, so it is only advised if other players are starting to clue into the decks' purposes.
THE WINNING
This is the stage where all your careful planning pays off. this stage can happen anywhere from mid game to late game, depending on the speed of the other players, and how fast you assembled the combo. but now it's assembled. try your best to start this stage when you can guarantee two things:
1. you can play all cards necessary to the combo in one turn, so you don't have to wait a round while being vulnerable.
2. other players who are likely to disrupt the combo are tapped out, or don't have enough mana to play a removal/counter spell.
The planning and order of this stage depends one what type of win condition you have.
THE TRIGGERED ABILITY
this includes cards like guttersnipe and fireweaver, who deal damage for each combo cycle. they need to be played before the combo starts. they are the most likely to be hti with removal,but if you have to play a card the turn before you assemble the combo, play these and hold up a cancel or negate.
THE HASTE-GIVER
these cards are the ones that can give your millions of tokens haste, these include chasm guide, and thopter engineer. these are the ones that you can cast with the leftover mana from your final combo cycle. these are the least vulnerable, and the best to have in hand, as they can be a backup if you draw into other win condition spells.
THE FIREBALL
these cards just use the millions of red mana you have to kill an opponent. it includes cards like Jaya's immolating inferno. these are the second best win condition to have, as they are more likely to be hit with a coutnerspell. if possible, when using this type of win condition, hold up mana for a haste-giver in hand when possible, in the case of a counterspell being played.
